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发明名称
Perfectionnements aux taillants de mine à percussion
摘要
申请公布号
FR1003544(A)
申请公布日期
1952.03.19
申请号
FRD1003544
申请日期
1947.01.21
申请人
SOCIETE LE CARBONE LORRAINE
发明人
分类号
E21B10/58
主分类号
E21B10/58
代理机构
代理人
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