SYSTEM FOR PROTECTING WATER-MAIN AGAINST FREEZING,申请号PL19870267378-传众专利搜索

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发明名称	SYSTEM FOR PROTECTING WATER-MAIN AGAINST FREEZING
摘要
申请公布号	PL267378(A1)	申请公布日期	1989.03.20
申请号	PL19870267378	申请日期	1987.08.18
申请人		发明人
分类号	E03B7/12;F16L;F16L53/00;F16L55/00;(IPC1-7):F16L/	主分类号	E03B7/12
代理机构		代理人
主权项
地址

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