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发明名称
A COMMUNICATION SYSTEM
摘要
申请公布号
GB8916693(D0)
申请公布日期
1989.09.06
申请号
GB19890016693
申请日期
1989.07.21
申请人
DOWTY MINING ELECTRONIC SYSTEMS LIMITED
发明人
分类号
主分类号
代理机构
代理人
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