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GB /T 13806.2-92 |
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UDC 621.885 | GB 891-
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国标GB /T3098.3-2000 GB3098.3 3098.3GB 紧固件机械性能
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国标GB /T3098.7-2000 GB3098.7 3098.7GB 紧固件机械性能
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国标GB /T3098.16-2000 GB3098.16 3098.16GB 紧固件机械
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国标GB /T891-1986 GB891 891GB(GB891-1976) 螺钉紧固轴