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发明名称
Outside cutter
摘要
申请公布号
US2481831(A)
申请公布日期
1949.09.13
申请号
US19480023100
申请日期
1948.04.24
申请人
ERWIN WELDON C
发明人
ERWIN WELDON C.
分类号
E21B29/00
主分类号
E21B29/00
代理机构
代理人
主权项
地址
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