6968| 12
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2Cr13焊接后有裂痕,什么原因 |
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點(diǎn)評(píng)
和原材料是沒(méi)有什么關(guān)系的
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點(diǎn)評(píng)
這里是說(shuō)2Cr13!不銹鋼?什么和什么?
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