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发明名称
Filtre électro-magnétique
摘要
申请公布号
FR673688(A)
申请公布日期
1930.01.17
申请号
FRD673688
申请日期
1928.08.21
申请人
发明人
DEVAUCELLE LOUIS PETIT
分类号
B03C1/033
主分类号
B03C1/033
代理机构
代理人
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