BS EN 12390-8 2019 Testing hardened concrete. Depth of penetration of water under pressure.pdf PDF 579.14KB 12页 BS EN ISO 17639 2013 Destructive tests on welds in metallic materials. Macroscopic and microscopic examination of welds.pdf PDF 894.48KB 18页 BS EN 1514-1-1997 法兰盘及其连接件有PN标识的法兰盘用密封件的尺寸第1部分.pdf PDF 314.4KB 22页 BS EN 328-1999 heat exchangers. test procedures for establishing the performance of forced convection unit air coolers for refrigeration this european .pdf PDF 3.31MB 40页
