TREPAN DE FORAGE DE ROCHE,申请号BE19806047251-传众专利搜索

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发明名称	TREPAN DE FORAGE DE ROCHE
摘要
申请公布号	BE884905(A7)	申请公布日期	1980.12.16
申请号	BE19806047251	申请日期	1980.08.22
申请人	LISTER WILLIAM	发明人	W. LISTER
分类号	E21B4/14;E21B10/38;E21B10/56;E21B17/07;(IPC1-7):E21C/	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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