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发明名称
摘要
申请公布号
JPH0283488(U)
申请公布日期
1990.06.28
申请号
JP19880162801U
申请日期
1988.12.15
申请人
发明人
分类号
G04B13/02;G04B19/04;(IPC1-7):G04B19/04
主分类号
G04B13/02
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代理人
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