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发明名称
Appareil pour le forage de roches
摘要
申请公布号
FR1227886(A)
申请公布日期
1960.08.24
申请号
FR19590798239
申请日期
1959.06.23
申请人
发明人
WALLACE JACK GORDON
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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