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Powder metallurgy

 Powdermetallurgyisa****ingandfabricationtechniqueconsistingofthreemajorprocessingstages.First,theprimarymaterialisphysicallypowdered,****idedintomanysmallin****idualparticles.Next,thepowderi…
类别:News 作者: 日期:2012-03-08 17.55.26 点击:44 评论:0