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发明名称
Switch operator
摘要
申请公布号
US1775170(A)
申请公布日期
1930.09.09
申请号
US19280295025
申请日期
1928.07.24
申请人
MELAHN AUGUST M
发明人
MELAHN AUGUST M.
分类号
H01H3/16
主分类号
H01H3/16
代理机构
代理人
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地址
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