单选题50~100p;micro;m的氧化铝主要用于()。A贵金属基底冠的粗化B半贵金属基底冠的粗化C非贵金属基底冠的粗化D去除铸件表面的包埋料E去除铸件表面在铸造过程中形成的氧化膜
单选题
50~100p;micro;m的氧化铝主要用于()。
A
贵金属基底冠的粗化
B
半贵金属基底冠的粗化
C
非贵金属基底冠的粗化
D
去除铸件表面的包埋料
E
去除铸件表面在铸造过程中形成的氧化膜
参考解析
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