标准查询
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GB/T 18230.6-2000 栓接结构用1型大六角螺母浸热 镀锌(加大攻丝尺寸) A和B级 5.6和8级
Hexagon nuts for structural bolting,style 1,hot-dip galvanized(oversize tapped)-Product grade A and B-Property classes 5.6 and 8
