REPLACING BURIED PIPE,申请号GB19840028925-传众专利搜索

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发明名称	REPLACING BURIED PIPE
摘要
申请公布号	GB8428925(D0)	申请公布日期	1984.12.27
申请号	GB19840028925	申请日期	1984.11.15
申请人	EXPAND-A-LINE INC	发明人
分类号	E21B7/30;F16L55/165	主分类号	E21B7/30
代理机构		代理人
主权项
地址

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