7894| 14
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大家好,!這種螺栓的名稱是什么,?M3的直徑,。 |
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點(diǎn)評(píng)
GB/T 9074.8-1988,,GB/T 9074.4-1988,。前一個(gè)頭小,后一個(gè)頭大
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