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发明名称
SWITCHING DEVICE COMBINATION
摘要
申请公布号
GB1545187(A)
申请公布日期
1979.05.02
申请号
GB19770022602
申请日期
1977.05.27
申请人
SIEMENS AG
发明人
分类号
E21F17/06;G01R13/40;H02B1/28;(IPC1-7):G09F9/32
主分类号
E21F17/06
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代理人
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