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发明名称
PERFECTIONNEMENTS APPORTES AUX TREPANS ET AUX BENNES DE FORAGE PAR PERCUSSION
摘要
申请公布号
FR2592089(B3)
申请公布日期
1988.03.11
申请号
FR19850019268
申请日期
1985.12.19
申请人
TAVERNIER RENE
发明人
分类号
E02F3/47;E21B7/00;E21B7/20;E21B10/32;(IPC1-7):E21B10/36;E21B1/00
主分类号
E02F3/47
代理机构
代理人
主权项
地址
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