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[求助] 铸件机加工后出现渣气孔如何解决 | 
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 永无止境 
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 多看多学,多思考! 
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 多看多学,多思考! 
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 永无止境 
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 多看多学,多思考! 
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 多看多学,多思考! 
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 永无止境 
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 温故而知新 
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 永无止境 
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 纸上谈兵 
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