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摘要
申请公布号
US2507949(A)
申请公布日期
1950.05.16
申请号
US19460657654
申请日期
1946.03.28
申请人
ASDER JOHN K
发明人
ASDER JOHN K.
分类号
H01H61/02
主分类号
H01H61/02
代理机构
代理人
主权项
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