APPARATUS FOR CATCHING OF STOPPERSSING DRILL,申请号BG19800048857-传众专利搜索

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发明名称	APPARATUS FOR CATCHING OF STOPPERSSING DRILL
摘要
申请公布号	BG30863(A1)	申请公布日期	1981.09.15
申请号	BG19800048857	申请日期	1980.08.15
申请人	NIKOV,IVAN T.;TRNDEV,DOBRI I.	发明人	NIKOV,IVAN T.;TRNDEV,DOBRI I.
分类号	E21B11/04;(IPC1-7):E21B11/04	主分类号	E21B11/04
代理机构		代理人
主权项
地址

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