4739| 11
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鋼管加厚擴(kuò)口成型,,求教 |
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點(diǎn)評(píng)
正確,,易加工,,加工后不管在空氣里或扔在油、水里,,都會(huì)給成型部分一點(diǎn)硬度,。
評(píng)分
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