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问题专业:土建,
  提问日期:2021-03-12 09:05:46


网友“尚尚”提问内容:


土建,河南,答疑:梁上的钢筋问题-河南土建

两个问题:

问题一:梁上的这种钢筋是吊筋嘛?

问题二:我已经在计算设置里边修改了,那画图的时候就不用整了吧?

土建,河南,答疑:梁上的钢筋问题-河南土建


业内专家“”回复:


这是主梁与次梁相交时的次梁加筋,计算设置里面修改后,最好用云检查查看有无遗漏。

问题专业:预算,结算,审核,
  提问日期:2021-03-12 08:05:14


网友“rxl”提问内容:


认可度的标准是什么呀?


业内专家“”回复:


所谓的大数据,只是片面的讲究清单编码及清单名称,对项目的清单描述的匹配还不是很高。所以,大数据只能参考定额的套取,不能作为真正的组价。我吃过亏,安装还好,你看看装饰,套的是一塌糊涂。。。

P DL/T5240-2010
Technical Code for Design and
Calculation of Combustion System of
Fossil-fired Power Plant
火力发电厂燃烧系统设计计算技术规程
(英文版)
Issue Date:May 24,2010
Implementation Date:October 1,2010
Issued by the National Energy Administration

DL/T 5240-2010,火力发电厂,燃烧系统设计计算技术,英文版,DL/T 5240-2010 英文版 火力发电厂燃烧系统设计计算技术规程

1 Scope
This code specifies the calculation methods for design of the boiler combustion system of fossil-fired power plants.
This code is applicable to the design calculation of combustion system of pulverized coal-fired boiler rated 65t/h3000t/h.
The design of circulating fluidized bed combustion (CFBC)boiler,oil-fired boiler,and gas-fired boiler
may be performed by referring to the relevant parts of this code.

2 Normative References
The following normative documents contain provisions which,through reference in this text,constitute
provisions of this code.For dated references,subsequent amendments (excluding the contents of errata)to,or revision of,any of these publications do not apply.However,parties to agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.For undated references,the latest edition of the normative documents apply.
GB/T 211 Determination of Total Moisture in Coal
GB/T 212 Proximate Analysis of Coal
GB/T 213 Determination of Calorific Value of Coal
GB/T 214 Determination of Total Suffer in Coal
GB/T 219 Determination of Fusibility of Coal Ash
GB/T 476 Determination of Carbon and Hydrogen in Coal
GB/T 1574 Test Method for Analysis of Coal Ash
GB/T 1920 Standard Atmosphere (below 30 kilometers)
GB/T 2565 Determination of Grindability Index of Coal (Hardgrove method)
GB/T 2900.48 Electrotechnical Terminology of Boilers
GB/T 3715 Terms Relating to Properties and Analysis of Coal
GB/T 5751-2009 Chinese Classification of Coals
GB/T 7562-1998 Technical Condition of Coal Used for Pulverized Coal-fired Boiler for Power
Generation

GB/T 10184-1988 Performance Test Code for Utility Boiler
GB 13223 Emission Standard of Air Pollutants for Thermal Power Plants
GB 13271 Emission Standard of Air Pollutants for Coal-burning,Oil-burning and Gas-fired Boiler
GB/T 15224.1-2004 Classification for Quality of Coal-Part 1:Ash
GB/T 15224.2-2004 Classification for Coal Quality-Part 2:Sulfur Content
GB/T 15224.3-2004 Classification for Coal Quality-Part 3:Calorific Value
GB/T 15458 Determination of Abrasion Index of Coal
GB 50041-2008 Code for Design of Boiler Plant
DL/T 387-2010 Guideline for Flue Gas Bag Filter Selection for Thermal Power Plants
DL/T 435 Code for the Prevention of Pulverized Coal Firing Furnace Explosions/Implosions in Power
Plant Boilers
DL/T 461-2004 Guide for Operation and Maintenance of Electrostatic Precipitation for Coal-fired
Power Plants
DL/T 465 Determination of the Impingement Abrasion Index of Coal
DL/T 466-2004 Guide for Type Selection for Pulverizers and Pulverizing Systems of Power Stations
DL/T468-2004 Guidelines on Type Selection and Application of Power Boiler Fans
DL/T 514-2004 Electrostatic Precipitator
DL/T 660-2007 Test Procedure for the Viscosity of Coal Ash under High Temperature
DL/T 831-2002 Guide on Selection of Furnace Characteristic Parameters for Large Pulverized Coal
Fired Power Boilers

DL/T 1121-2009 Engineering Criteria of Bag Filter System for Coal-fired Power Plants
DL 5000 Technical Code for Designing Fossil Fuel Power Plants
DL/T 5121-2000 Technical Code for Design of Fossil-fueled Power Plant Air Flue Gas Ducts/Raw
Coal Pulverized Coal Piping
DL/T 5145-2002 Technical Code for Design and Calculation of Pulverized Coal Preparation System of
Fossil Fuel Power Plants
DL/T 5153--2001 Technical Rule for Designing Auxiliary Power System of Fossil-fueled Power Plants
DL/T 5203-2005 Technical Code for Explosion Prevention Design of Coal and Pulverized Coal
Preparation System of Fossil-fueled Power Plants
DLT 5196-2004 Technical Code for Designing Flue Gas Desulfurization Plant for Fossil Fired Power
Plants
MT/T 597-1996 Classification for Chlorinity in Coal
MT/T849—2000 Classification for Volatile Matter of Coal
MT/T 850-2000 Classification for Total Moisture in Coal
MT/T852—2000 Classification for Hardgrove Grindability Index of Coal
MT/T 853.1-2000 Classification for Coal Ash Fusibility
MT/T 853.2-2000 Classification for Flow Temperature of Coal Ash
MT/T 963-2005 Classification for Mercury in Coal
MT/T966—2005 Classification for Fluorine in Coal
NFPA 85-2007 Boiler and Combustion Systems Hazards Code
TRD 413-1996 Kohlenstaubfeuerungen an Dampfkesseln
ASME PTC.4.1 Power Test Code for Steam Generating Units
ASME PTC.4.3 Power Test Code for Air Heaters
ASTM D 388-2005 Standard Classification of Coals by Rank
EPRI Wet Stacks Design Guidelines

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DL/T 5240-2010 英文版 火力发电厂燃烧系统设计计算技术规程已关闭评论

ICS 27.100
P 62
Record No. J436—2005
Electric Power Industry Standard of the People's Republic of China
P DL / T 5224 — 2005
Technical Rule for the Design of
HVDC Earth Return Operation System
Issue Date: February 14, 2005 implementation Date: June 1, 2005
Issued by the National Development and Reform Commission of the People's Republic of China

DL/T 5224-2005,直流输电大地返回运行系统,英文版,设计技术,高压,DL/T 5224-2005 英文版 高压直流输电大地返回运行系统设计技术规定

1 Scope
This rule specifies the technical rules for the design of HVDC earth return operation systems and provides the design principles and methods for such systems.
This rule is applicable to the design and test of earthing electrodes on land and (overhead) earthing electrode lines of monopolar and bipolar HVDC power transmission systems.

2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this rule. For dated references, subsequent amendments (excluding the contents of errata) to, or revision of, any of these publications do not apply. However, parties to agreements based on this rule are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 17949.1 Guide for Measuring Earth Resistivity, Ground Impedance and Earth Surface Potentials of a Ground System—Part 1:Normal Measurements
GB 50021—2001 Code for Investigation of Geotechnical Engineering
DL/T 5092—1999 Technical Code for Designing 110 kV— 500 kV Overhead Transmission Line
DL/T 5159—2002 Technical Code for Geophysical Exploration Electric Power Engineering
SL 237—1999 Test Code of Soil

3 Terms and Definitions
The following terms and definitions apply to this rule.
3.0.1 HVDC earth return operation system
A group of devices specially designed and built as current return circuit with earth or seawater in HVDC power transmission system. It mainly includes earthing electrode line, earthing electrode, current guiding system and auxiliary facilities.
3.0.2 Earthing electrode site
The site where the earthing electrode is located.
3.0.3 Earthing electrode line
The overhead line or buried cable connecting the neutral bus in the converter station and the current guiding system of the earthing electrode.
3.0.4 Earthing electrode
An earthing device that can continuously transfer DC current for the DC system, composed of a number of earthing conductors and active filling material. Land installed earthing electrodes are known as land earthing electrodes and those installed onshore or offshore are known as onshore or offshore earthing electrodes.
3.0.5 Current guiding-system
Devices guiding the current from the earthing electrode line to the feeding rods in the earthing electrode, consisting of current guiding wire, frame, disconnector, feeding cable and connection.
3.0.6 Feeding rod
Earthing conductors embedded in the active fillers of an earthing electrode.

 

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DL/T 5224-2005 英文版 高压直流输电大地返回运行系统设计技术规定已关闭评论

ICS 27.100
P 62
Record No. J435—2005
Electric Power Industry Standard of the People's Republic of China
P DL / T 5223 — 2005
Technical Rule for Designing
HVDC Converter Station
Issue Date: February 14, 2005 implementation Date: June 1, 2005
Issued by the National Development and Reform Commission of the People's Republic of China

DL/T 5223-2005,换流站,英文版,设计技术,高压,高压直流换流站,DL/T 5223-2005 英文版 高压直流换流站设计技术规定

1 Scope
This rule specifies the selection of converter station site, performance requirements for DC transmission systems, electrical design of converter stations, selection of main equipment, control and protection design, communication design and auxiliary system design.
This rule is applicable to the design of converter stations in long distance monopolar/bipole HVDC transmission systems, and may provide reference for the design of back-to-back DC converter stations.

2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this rule. For dated references, subsequent amendments (excluding the contents of errata) to, or revision of, any of these publications do not apply.
However, parties to agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB 4387 Safety Regulation for Transportation in Plants of Industrial Enterprises
GB 14285 Technical Code for Relaying Protection and Security Automatic Equipment
GB 50009 Load Code for the Design of Building Structures
GB 50010 Code for Design of Concrete Structures
GB 50011 Code for Seismic Design of Buildings
GB 50017 Code for Design of Steel Structures
GB 50019 Code for Design of Heating Ventilation and Air Conditioning
GB 50062 Design Code for Relaying Protection and Automatic Device of Electric Power Installation
GB 50074 Code for Design of Oil Depot
GB 50116 Code for Design of Automatic Fire Alarm System
GB 50217 Code for Design of Cables Electric Work
GB 50229 Code for Fire-Protection Design Power Plant and Substation

GB 50260 Code for Design of Seismic of Electrical Installations
GBJ 16 Code of Design on Building Fire Protection and Prevention
DL/T 605 Guide for Insulation Coordination of HVDC Convertor Stations
DL/T 620 Overvoltage Protection and Insulation Coordination
for AC Electrical Installations
DL/T 621 Grounding for AC Electrical Installations
DL/T 5044 Technical Code for Designing DC System of Power Projects
DL/T 5056 Technical Code of General Plan Design for Substation
DL/T 5136—2001 Technical Code for Designing of Electrical Secondary Wiring in Fossil Fuel Power Plants and Substations
DL/T 5137 Technical Code for Designing Electrical Measuring and Energy Metering Device
DL/T 5149 Technical Code for Designing Computerized Monitoring and Control System of 220 kV-500 kV Substations
DL/T 5155 Technical Code for Designing AC Station Service of 220 kV-500 kV Substation
DL/T 5218 Technical Code for Designing 220 kV-500 kV Substation
DL/T 5225 Technical Rule of Communication Design for 220 kV-500 kV Substation
SDJ 5 Technical Code for Designing High Voltage Electrical Switchgear
SDGJ 14 Design Technical Rule for Selecting Conductor and Electrical Equipment
IEC 60071—2 Insulation Co-ordination - Part 2: Application Guide

IEC 60099—4 Surge Arresters - Part 4: Metal-Oxide Surge Arresters Without Gaps for AC Systems
IEC 60633: 1998 Terminology for High-Voltage Direct Current (HVDC) Transmission
IEC 61803: 1999 Determination of Power Losses in HighVoltage Direct Current (HVDC) Converter Stations CIGRE 3314 Application Guide for Metal Oxide Surge Arresters without Gaps in HVDC Converter Stations (WG05 report) Decree No. 30 issued by the State Economic and Trade Commission Regulations for Safety Protection of Computerized Monitoring and Control System and Dispatching Data Network in Power Grids and Power Plants

3 Terms and Definitions
The following terms and definitions apply to this rule.
3.1 High Voltage Direct Current (HVDC) System and Converter Station
3.1.1
HVDC system
Electrical power system which transfers energy in the form of high voltage direct current between two or more AC buses.
3.1.2
Two-terminal HVDC transmission system
HVDC transmission system consisting of two converter stations and the connecting HVDC transmission lines (see Figure 3.1.2).

3.1.3
Back-to-back DC coupling system
A type of electric power facility which connects two
asynchronous AC power systems through AC-DC-AC conversion without DC transmission lines, also called Asynchronous Interconnection Station. If the connected two AC power systems have different rated frequencies, the facility is also called frequency conversion station. In a back-to-back coupling system, two sets of converter equipment for rectifier and inverter are installed in one station, their DC sides are connected each other via smoothing reactor(s), and their AC sides are connected to different AC systems separately, thus the asynchronous interconnection and power exchange between two asynchronous AC power systems are realized.
3.1.4
HVDC system pole (pole)
Part of an HVDC system consisting of all the equipment in both converter stations of a two-terminal HVDC transmission system and the interconnecting transmission lines, if any, which during normal operation exhibit a common direct voltage polarity with respect to earth (see Figure 3.1.2).
3.1.5
Monopolar (unipolar) HVDC system
HVDC system with only one pole.

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ICS27.100
P62
Record No.J429—2005
Electric Power Industry Standard of the People's Republic of China
DL/T5217-2005
Technical Code for Design of
220 kV-500 kV Compact Overhead
Transmission Line

Issue Date:February 14,2005
Implementation Date:June 1,2005
Issued by the National Development and Reform Commission of the People's Republic of China

220kV~500kV,DL/T 5217-2005,架空送电线路设计,紧凑型,英文版,DL/T 5217-2005 英文版 220kV~500kV紧凑型架空送电线路设计技术规定

1 Scope
1.0.1 This code specifies the main design and technical requirements for 220 kV-500 kV AC compact overhead transmission lines.
1.0.2 This code is applicable to the design of 220 kV-500 kV compact overhead transmission lines (hereinafter referred to as compact lines).
1.0.3 This code is not applicable to the design of compact lines in heavy icing areas and those with a large span.

2 Normative References
The following normative documents contain provisions which,through reference in this text,constitute the provisions of this code.For dated references,subsequent amendments(excluding the contents of errata) to,or revision of,any of these publications do not apply.However,parties to agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.For undated references,the latest edition of the normative document referred to applies.
DL/T 5092-1999 Technical Code for Designing 110 kV-500 kV Overhead Transmission Line
DL/T 5154-2002 Technical Regulation of Design for Tower and Pole Structures of Overhead Transmission Line

3 General
3.0.1 The construction of compact line shall be demonstrated in terms of the necessity,economic benefits and social benefits from the perspective of increase of the transmission capacity of power grids and save of line corridors.
3.0.2 The design of compact lines must be in compliance with the national basic construction strategy and economic policies and be safe,reliable,economic and reasonable.
3.0.3 This code is based on DL/T 5092-1999 and makes supplementary provisions on the technical design of compact lines.
For the basic rules governing loads,materials,structural design,structure and foundation of towers,refer to DL/T 5092-1999.
3.0.4 In addition to the requirements stipulated in this code,relevant provisions specified in the current national standards and electric power industry standards shall also be complied with in the design of compact lines.

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ICS 27.100
P 60
Record No. J181—2002
Electric Power Industry Standard of the People's Republic of China
P DL / T 5159 — 2002
Technical Code for Geophysical
Exploration Electric
Power Engineering
Transmission Lines

Issue Date: April 27, 2002 implementation Date: September 1, 2002
Issued by the State Economic and Trade Commission of the People's Republic of China

DL/T 5159-2002,物探技术,电力工程,英文版,DL/T 5159-2002 英文版 电力工程物探技术规程

1 Scope
This code specifies the technical methods, requirements,measurements, data analysis and interpretation methods for engineering geophysical exploration, and is applicable to newly built or expanded fossil fuel power plants, nuclear power plants,substations, overhead transmission lines, and planning of electric power systems. This code may be taken as a reference for other types of geophysical exploration activities.

2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute the provisions of this code.
For dated references, subsequent amendments (excluding the contents of errata) to, or revision of, any of these publications do not apply.
However, parties to agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative documents apply.
GB/T 50269—1997 Code for Measurement Method of Dynamic Properties of Subsoil
DL 5001—1991 Technical Code for Engineering Survey of Fossil Fuel Power Plants
DL 5010—1992 Code for Engineering Geophysical Exploration Hydropower and Water Resources
DL/T 5156.5—2002 Electric Power Engineering Surveying Drawings Part 5: Geophysical Prospecting
CJJ 61—1994 Technical Specification for Detecting and Surveying of Underground Pipelines and Cables in City
JGJ/T 93—1995 Specification for Low Strain Dynamic Testing of Piles
JGJ 106—1997 Specification for High Strain Dynamic Testing of Piles
JGJ 944—1994 Technical Code for Building Pile Foundation

3 General Provisions
3.0.1 The geophysical exploration used in hydrogeological and geotechnical investigation for electric power construction purposes is collectively called electric power engineering geophysical exploration (hereinafter referred to as geophysical exploration). Nowadays commonly used methods include electrical method, seismic method, well logging method, rock-soil in-situ test, non destructive testing of piles, underground pipelines and cables detection technology, radon detection technology, sonic test technology, and Rayleigh wave test technology.
3.0.2 Geophysical exploration is an important means of geological exploration, ground treatment, and quality examination. Its proper use in conjunction with electric power surveying and design characteristics may help improve the surveying quality, shorten the time, and reduce the cost.
3.0.3 Geophysical exploration must be carried out in close conjunction with geological survey. Attention is drawn to tests and determination of various physical parameters of rock and soil, which shall be utilized in an extensive manner to overcome the limitations of a single method in conditional use and multiple interpretations, and obtain correct conclusions.
3.0.4 New geophysical exploration technologies shall be actively used and promoted. Attention is to be given to the verification of geophysical exploration results and the return visit for geologic effects.
3.0.5 In electric power engineering, the geophysical exploration work processes are generally as follows: acceptance of task; data collection; reconnaissance survey; plan preparation; method testing;field work; data organization; submission of results. The above processes may be streamlined under special circumstances.

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ICS 27.100
P 60
Record No. J180—2002
Electric Power Industry Standard of the People’s Republic of China
P DL / T 5158 — 2002
Technical Code of Meteorological
Surveying for Electrical
Power Projects

Issue Date: April 27, 2002 implementation Date: September 1, 2002
Issued by State Economic and Trade Commission of the People’s Republic of China

DL/T 5158-2002,气象勘测技术,电力工程,英文版,DL/T 5158-2002 英文版 电力工程气象勘测技术规程

1 Scope
This code specifies the contents and technical principles of meteorological surveying for electrical power projects and is applicable to the meteorological surveying for large-scale power generation, transmission and transformation projects that are newly built, expanded and modified as well as the electric power projects of microwave and optical fiber-based communication. Also, it can be used as a reference for meteorological surveying for other electric power projects than those described above.

2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this code. When this code is published, the standards of the indicated editions are all effective and in force. However, all the standards may be revised. The parties that use this code are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 50009—2001 Load Code for the Design of Building Structures
JTJ 213—1998 Code of Hydrology for Sea Harbor
Code for Surface Meteorological Observation, prepared by
China Meteorological Administration in 1979

3 General
3.0.1 The analysis and calculation of metrological conditions must place emphasis on the fundamental data which shall be reviewed in terms of typicality, reliability and consistency.
3.0.2 When calculating the design wind velocity and ice coating thickness of a region where sufficient data is not available, multiple calculation methods shall be employed as practical as possible. The calculation results derived from these methods shall be analyzed comprehensively so as to select reasonable results.
3.0.3 Where the project site is far away from the local meteorological station and the terrain conditions there vary greatly, short-term meteorological observation station, wind measuring station, icing observation station shall be established based on the design requirements so as to obtain the necessary actual data.
3.0.4 Where special meteorological data is needed for air cooling system of thermal power plants and wind farms and cannot be made available from the local meteorological station, special metrological station shall be established at the project site to continuously observe wind velocity, wind direction and ambient temperature.
3.0.5 For electric power projects under construction or those have been completed and put into operation, if catastrophic accidents including unusual strong wind and ice coating of conductors occur,the relevant personnel shall, together with the design personnel of the projects, promptly visit the site for metrological survey, further analyzing and demonstrating the metrological conditions of design and proposing the corresponding engineering measures.

3.0.6 The metrological surveying for electrical power projects shall be carried out based on the experiences gained on an ongoing basis,through aggressive and prudent use of the domestic and foreign proven and state-of-art theories, methods and technologies.

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ICS 27.100
P 62
Record No. J150—2002
Electric Power Industry Standard of the People’s Republic of China
P DL / T 5147 — 2001
Designing Technical Rules for
Security and Automaticity
Equipment of Power System
Issue Date: December 26, 2001 implementation Date: May 1, 2002
Issued by the State Economic and Trade Commission of the People’s Republic of China

DL/T 5147-2001,安全自动装置设计,电力系统,英文版,DL/T 5147-2001 英文版 电力系统安全自动装置设计技术规定

1 Scope
These rules stipulate the principled requirements on calculation and analysis of security and stability of power system, design and configuration of security and automaticity equipment during the design of power system and are applicable to the design of security and automaticity equipment of power system, the design of security and automaticity equipment necessary for connecting power plants and substations to power system as well as the study on configuration schemes of security and automaticity equipment.

2 Normative References
The following normative references contain provisions which,through reference in this text, constitute provisions of these rules for dated references, subsequent amendments to (excluding error corrections), or revisions of, any of these publications do not apply.
When these rules are published, the revisions shown herein are in force. However, parties entered into agreements based on this code are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest editions thereof shall apply.
GB 14285—1993 Technical Code for Relaying Protection and Security Automatic Devices
DL/T 559—1994 Code for Operation Settings of Relay Protection Equipment in 220-500 kV Power Grids
DL 428—1991 Technical Rules for Automatic Low Frequency Load Shedding of Power System
DL755—2001 Guide on Security and Stability for Power System
SD 131—1984 Technical Guidelines for Power System (trial)

3 General
3.0.1 The design of security and automaticity equipment of power system shall comply with the requirements of DL 755—2001 Guide on Security and Stability for Power System. The security and automaticity equipment of power system can be classified into the following categories by their functional applications: equipment to automatically prevent loss of stability, equipment to automatically eliminate asynchronous operation, equipment to eliminate frequency or voltage deviations that may lead to accident evolvement or damages to equipment, and equipment to restore normal operation of power system.
The security and stability control system of power system is mainly intended to prevent loss of stability of power system and avoid the system accidents of power system, such as large-scale blackouts.
3.0.2 The security and automaticity equipment of power system should preferably employ simple, reliable, proven and effective equipment that are deployed in a distributed manner. Various equipment intended for different controlled objects shall be able to work collaboratively.
3.0.3 The hardware of power system stability control equipment shall be universal to a certain degree, while its software shall be modularized to allow for the system evolvement.

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