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发明名称
METHODE ET SYSTEME DE TRANSMISSION D'INFORMATIONS PAR ONDE ELECTROMAGNETIQUE
摘要
申请公布号
FR2785017(B1)
申请公布日期
2000.12.22
申请号
FR19980013304
申请日期
1998.10.23
申请人
GEOSERVICES
发明人
SOULIER LOUIS
分类号
E21B47/13;E21B47/12;G01V3/30;(IPC1-7):E21B47/12
主分类号
E21B47/13
代理机构
代理人
主权项
地址
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