DEVICE FOR HOLDING DRILL STRING,申请号SU19864115221-传众专利搜索

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发明名称	DEVICE FOR HOLDING DRILL STRING
摘要
申请公布号	SU1370224(A1)	申请公布日期	1988.01.30
申请号	SU19864115221	申请日期	1986.06.04
申请人	DO GPKEXI KOMPLEX MEKH SHAKHT	发明人	RADZIVILOVICH LEONID L,SU;AKULOV VIKTOR A,SU;GAVRILOV OLEG P,SU;ERMOLAEV VLADIMIR S,SU
分类号	E21B19/10;E21D3/00	主分类号	E21B19/10
代理机构		代理人
主权项
地址

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