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发明名称
Barrage à clapet
摘要
申请公布号
FR806619(A)
申请公布日期
1936.12.21
申请号
FRD806619
申请日期
1936.05.20
申请人
发明人
LUTZ ALOIS VICTOR
分类号
E02B7/36
主分类号
E02B7/36
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代理人
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