NBN-EN 20225-1992 3125 《固定成分 螺栓；螺钉；螺杆和螺母 尺寸代号和指示》.pdf

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GB T 5276-2015 紧固件 螺栓、螺钉、螺柱及螺母 尺寸代号和标注.pdf

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FZ T 90029.5-1991 针织用针分类、术语及产品代号编法 产品代号编法.pdf

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