Self-cleaning mechanism for use in drill string,申请号GB20020011746-传众专利搜索

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发明名称	Self-cleaning mechanism for use in drill string
摘要
申请公布号	GB0211746(D0)	申请公布日期	2002.07.03
申请号	GB20020011746	申请日期	2002.05.22
申请人	DRILLING SYSTEMS INTERNATIONAL LIMITED	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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