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发明名称
Procédé de balisage par ondes électromagnétiques
摘要
申请公布号
FR706446(A)
申请公布日期
1931.06.24
申请号
FRD706446
申请日期
1930.11.20
申请人
发明人
BESSON PIERRE
分类号
G01S1/02
主分类号
G01S1/02
代理机构
代理人
主权项
地址
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