4478| 12
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滲碳鋼一般不調(diào)質(zhì)嗎,? |
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點(diǎn)評(píng)
這個(gè)料是要滲碳的,。否則表面硬度不夠,。
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點(diǎn)評(píng)
大俠謝謝,,你說的我哦也懂,。
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