MOBILE SELF-PROPELLED ROTARY DRILLING RIG,申请号PL19790220552-传众专利搜索

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发明名称	MOBILE SELF-PROPELLED ROTARY DRILLING RIG
摘要
申请公布号	PL130221(B1)	申请公布日期	1984.07.31
申请号	PL19790220552	申请日期	1979.12.19
申请人		发明人
分类号	E21B;E21B7/00;(IPC1-7):E21B7/00	主分类号	E21B
代理机构		代理人
主权项
地址

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