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发明名称
Rail punch
摘要
申请公布号
US2156172(A)
申请公布日期
1939.04.25
申请号
US19380215487
申请日期
1938.06.23
申请人
BIBB PEARL M
发明人
BIBB PEARL M.
分类号
E01B31/06
主分类号
E01B31/06
代理机构
代理人
主权项
地址
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