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发明名称
Dispositif pour empêcher la réaspiration des liquides dans les canalisations tubulaires
摘要
申请公布号
FR1310784(A)
申请公布日期
1962.11.30
申请号
FR19610879483
申请日期
1961.11.20
申请人
FERCH & NABBEN
发明人
分类号
E03C1/10
主分类号
E03C1/10
代理机构
代理人
主权项
地址
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