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摘要
申请公布号
US2963561(A)
申请公布日期
1960.12.06
申请号
US19580737960
申请日期
1958.05.26
申请人
A. B. CHANCE COMPANY
发明人
BRIDGES RONALD P.
分类号
H01H31/28
主分类号
H01H31/28
代理机构
代理人
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