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发明名称
Ball transfer
摘要
申请公布号
US1963956(A)
申请公布日期
1934.06.26
申请号
US19310524117
申请日期
1931.03.20
申请人
MATHEWS CONVEYER COMPANY
发明人
CRAIG JAMES
分类号
E02F3/30
主分类号
E02F3/30
代理机构
代理人
主权项
地址
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