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发明名称
Improved means for making bore-holes, particularly in sticky ground
摘要
申请公布号
GB898939(A)
申请公布日期
1962.06.14
申请号
GB19590042214
申请日期
1959.12.11
申请人
SOLETANCHE
发明人
MASSON ROGER;BERNARD MICHEL
分类号
E21B27/00
主分类号
E21B27/00
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