Bridge plug with compound by-pass valve,申请号GB19650049776-传众专利搜索

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发明名称	Bridge plug with compound by-pass valve
摘要
申请公布号	GB1099817(A)	申请公布日期	1968.01.17
申请号	GB19650049776	申请日期	1965.11.23
申请人	BYRON JACKSON INC.	发明人
分类号	E21B33/126	主分类号	E21B33/126
代理机构		代理人
主权项
地址

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