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发明名称
摘要
申请公布号
JPS5497166(U)
申请公布日期
1979.07.09
申请号
JP19770173221U
申请日期
1977.12.22
申请人
发明人
分类号
G04C21/02;G04C21/20;(IPC1-7):G04C21/20
主分类号
G04C21/02
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代理人
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