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发明名称
Magnetic fishing tool
摘要
申请公布号
US2834630(A)
申请公布日期
1958.05.13
申请号
US19550494733
申请日期
1955.03.16
申请人
GREER WARNER W
发明人
GREER WARNER W.
分类号
E21B31/06
主分类号
E21B31/06
代理机构
代理人
主权项
地址
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