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经营范围
发明名称
Tumbling mill
摘要
申请公布号
US2420748(A)
申请公布日期
1947.05.20
申请号
US19440545892
申请日期
1944.07.21
申请人
HOWARD GEORGE M
发明人
HOWARD GEORGE M.
分类号
B24B31/02
主分类号
B24B31/02
代理机构
代理人
主权项
地址
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