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紧固件机械性能不锈钢螺栓、螺钉和螺柱2016/06/01 · GB/T 3098.1-2000紧固件机械性能 螺栓、 螺钉和螺柱(idt ISO 898一1: 1999) I4-3一4 3.1 标记 螺栓、螺钉和螺柱的不锈钢组别和性能等级的标
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