RING OF PREVENTING LEAKAGE OF CONNECTED PORTION OF UNDERGROUND BURIED PIPE AND ITS USE METHOD,申请号JP19770139897-传众专利搜索

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发明名称	RING OF PREVENTING LEAKAGE OF CONNECTED PORTION OF UNDERGROUND BURIED PIPE AND ITS USE METHOD
摘要
申请公布号	JPS5473317(A)	申请公布日期	1979.06.12
申请号	JP19770139897	申请日期	1977.11.24
申请人	TERADA SHIYOUJI KK	发明人	KIUCHI KATSUO
分类号	F16L21/02	主分类号	F16L21/02
代理机构		代理人
主权项
地址

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