ARRANGEMENT FOR SEALING WELL MOUTH,申请号SU19874188682-传众专利搜索

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发明名称	ARRANGEMENT FOR SEALING WELL MOUTH
摘要
申请公布号	SU1434075(A1)	申请公布日期	1988.10.30
申请号	SU19874188682	申请日期	1987.02.02
申请人	PERSHIN MIKHAIL N,SU	发明人	PERSHIN MIKHAIL N,SU
分类号	E21B33/03	主分类号	E21B33/03
代理机构		代理人
主权项
地址

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