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发明名称
Calculator keyboard switch with disc spring contact and printed circuit board
摘要
申请公布号
USRE30923(E)
申请公布日期
1982.05.04
申请号
US19790093686
申请日期
1979.11.13
申请人
发明人
分类号
H01H13/70;H01H13/785
主分类号
H01H13/70
代理机构
代理人
主权项
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