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发明名称
Multiple unit switch
摘要
申请公布号
US1939185(A)
申请公布日期
1933.12.12
申请号
US19320616390
申请日期
1932.06.10
申请人
NEUMAN JACOB J
发明人
NEUMAN JACOB J.
分类号
B04B13/00
主分类号
B04B13/00
代理机构
代理人
主权项
地址
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