HOLD-DOWN FOR WELL PACKERS,申请号CAD571246-传众专利搜索

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发明名称	HOLD-DOWN FOR WELL PACKERS
摘要
申请公布号	CA571246(A)	申请公布日期	1959.02.24
申请号	CAD571246	申请日期
申请人	JOHNSTON TESTERS	发明人	THOMAS L. LONG
分类号		主分类号
代理机构		代理人
主权项
地址

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