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发明名称
摘要
申请公布号
JPS638689(U)
申请公布日期
1988.01.20
申请号
JP19860102786U
申请日期
1986.07.04
申请人
发明人
分类号
G04B19/04;(IPC1-7):G04B19/04
主分类号
G04B19/04
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