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发明名称
Processing of materials
摘要
申请公布号
US2387548(A)
申请公布日期
1945.10.23
申请号
US19400362563
申请日期
1940.10.24
申请人
OREFRACTION INCORPORATED
发明人
WIEGAND EDWIN L.
分类号
B02C19/06
主分类号
B02C19/06
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代理人
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