SEAL ASSEMBLY FOR A WELL,申请号GB19750008005-传众专利搜索

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发明名称	SEAL ASSEMBLY FOR A WELL
摘要
申请公布号	GB1500936(A)	申请公布日期	1978.02.15
申请号	GB19750008005	申请日期	1975.02.26
申请人	NELSON N;PUTCH S	发明人
分类号	E21B33/02;E21B33/04;E21B33/043;(IPC1-7):E21B33/04	主分类号	E21B33/02
代理机构		代理人
主权项
地址

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