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发明名称
Material reduction mill employing ball charges
摘要
申请公布号
US2680570(A)
申请公布日期
1954.06.08
申请号
US19530407761
申请日期
1953.12.09
申请人
DAVID WESTON
发明人
WESTON DAVID
分类号
B02C17/04
主分类号
B02C17/04
代理机构
代理人
主权项
地址
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