光滑环规 79 80 81 82 83 84 85 86 87 内径量表对表光面校对量规
7模80 81 82 83 84 85 86 87 88 89t精密圆柱直齿轮
1外径80/81/82/83/84/85/86/-108橡胶密封件耐油
25模80 81 82 83 84 85 86 87 88 89t圆柱直齿轮麦
无缝管精密光亮无缝钢管外径80/81/82/83/84/85/86/87/88壁厚2至5
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