DRILL STEM MUD WIPING APPARATUS,申请号GB19900018333-传众专利搜索

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发明名称	DRILL STEM MUD WIPING APPARATUS
摘要
申请公布号	GB2237046(B)	申请公布日期	1993.01.06
申请号	GB19900018333	申请日期	1990.08.21
申请人	UVON * SKIPPER	发明人	UVON * SKIPPER
分类号	E21B21/10;E21B34/08;E21B37/04	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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