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发明名称
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摘要
申请公布号
US2108993(A)
申请公布日期
1938.02.22
申请号
US19340730075
申请日期
1934.06.09
申请人
SCHWEITZER & CONRAD, INC.
发明人
RAMSEY ALLAN
分类号
H01H85/54
主分类号
H01H85/54
代理机构
代理人
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