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[求助] 各位大神,为什么压出来这么白 研磨洗出来这么黑? | 
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 事不三思  总有败。人能百忍  自无忧。 
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 健坤 
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 压铸件,冲压件,CNC,电脑配件,五金配件去毛刺抛光清洗设备 18968682082赖军 
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 抛丸 
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