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发明名称
摘要
申请公布号
JPS592551(Y2)
申请公布日期
1984.01.24
申请号
JP19780016865U
申请日期
1978.02.13
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发明人
分类号
G04B27/00;(IPC1-7):G04B27/00
主分类号
G04B27/00
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