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发明名称
Arrache-carotte et son adaptateur pour forage de reconnaissance géologique
摘要
申请公布号
FR1457959(A)
申请公布日期
1966.11.04
申请号
FR19650041798
申请日期
1965.12.10
申请人
JOINT COAL BOARD
发明人
分类号
E21B25/12
主分类号
E21B25/12
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