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1.self-lock pin
2.This paper analyzes and compares the ordinary heat treatment technology of Q275 steel knuckle pivot pin with the quenching and backfiring technology.
摘要分析、比较了Q275钢钩尾销普通热处理工艺与锻热淬火+回火工艺。收藏指正
3.balance pin;
4.Pin Ya
5.pin a
弯曲销收藏指正
6.bobby pin
[美]小发夹收藏指正
7.rolling pin;
擀面杖收藏指正
8.Pin Chang
9.safety pin;
10.bolt pin;
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