Couplings for rotary drill strings.,申请号ZA20030000136-传众专利搜索

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发明名称	Couplings for rotary drill strings.
摘要
申请公布号	ZA200300136(B)	申请公布日期	2003.11.07
申请号	ZA20030000136	申请日期	2003.01.06
申请人	HAINES, TODD ANDREW	发明人	TODD ANDREW HAINES
分类号	E21B	主分类号	E21B
代理机构		代理人
主权项
地址

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