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发明名称
TRAINING FOR PABX OPERATORS
摘要
申请公布号
GB8917930(D0)
申请公布日期
1989.09.20
申请号
GB19890017930
申请日期
1989.08.04
申请人
TELECOM POTENTIAL LIMITED
发明人
分类号
主分类号
代理机构
代理人
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