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[求助] 锌合金,这是氮气不够还是哪里堵了?求解 | 
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 擅长锌铝合金压铸产品的异常分柝解决!压铸管理;成本管控;压铸模具改良;压铸机维修保养! 
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 专业锌压铸 
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 张长明 
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 不必仰望月亮.你即星辰之辉 
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 精通锌压铸主打锌压铸答疑17年从事压铸在浙江永康就职做过锌合金高档锁具和指纹锁 
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