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摘要
申请公布号
US1959835(A)
申请公布日期
1934.05.22
申请号
US19300497411
申请日期
1930.11.22
申请人
MEGINNISS FRANCIS R
发明人
MEGINNISS FRANCIS R.
分类号
H01H35/14
主分类号
H01H35/14
代理机构
代理人
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