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发明名称
摘要
申请公布号
JPH0335496(U)
申请公布日期
1991.04.08
申请号
JP19890096380U
申请日期
1989.08.18
申请人
发明人
分类号
G04B19/23;(IPC1-7):G04B19/23
主分类号
G04B19/23
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