中华人民共和国航空航天工业部航空工业标准 HB4355-89 槽形圆螺母 代裤 d-6H 中7 分类代号:F522 标示例:d=M3的槽形圆螺母F52201 mm 标记代号 d F52201 M3 F52202 M4 1.材料:45GB699-65 2.热处理:HRC35~40 3.技术条件楼:HB4388-89 航空航天工业1989一07-12发布 1989一12一0/实施 ...
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