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发明名称
Double backflow preventer
摘要
申请公布号
CH612234(A5)
申请公布日期
1979.07.13
申请号
CH19760005075
申请日期
1976.04.22
申请人
KESSEL, BERNHARD
发明人
BERNHARD KESSEL
分类号
E03F5/042;(IPC1-7):E03F5/04;E03F7/04
主分类号
E03F5/042
代理机构
代理人
主权项
地址
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