23573| 24
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請問一下熱處理和滲氮 |
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點(diǎn)評(píng)
滲氮,耐磨啊
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點(diǎn)評(píng)
管螺紋查標(biāo)準(zhǔn),不用 瞎計(jì)算什么。1/2之類標(biāo)準(zhǔn)多大就多大,螺距也是一定的
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