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发明名称
COMMUNICATIONS SYSTEM
摘要
申请公布号
GB8613438(D0)
申请公布日期
1986.07.09
申请号
GB19860013438
申请日期
1986.06.03
申请人
SOC NATIONALE ELF AQUITAINE (PRODUCTION)
发明人
分类号
E21B33/035;(IPC1-7):H04Q9/00
主分类号
E21B33/035
代理机构
代理人
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