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发明名称
Improvements in clock operated electric switches and valves
摘要
申请公布号
GB387143(A)
申请公布日期
1933.02.02
申请号
GB19320006263
申请日期
1932.03.02
申请人
ARTHUR DOUGLAS OHLSON;HARRY BROAD
发明人
分类号
G04C23/22
主分类号
G04C23/22
代理机构
代理人
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地址
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