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GB /T 13806.2-92 |
国标GB /T13806.1-1992 GB13806.1 13806.1GB 精密机械用
国标GB /T3098.7-2000 GB3098.7 3098.7GB 紧固件机械性能
CB/T679-2000 Others679 679Others 旋绕式铜皮管箍
国标GB /T892-1986 GB892 892GB(GB892-1976) 螺栓紧固轴
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