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发明名称
摘要
申请公布号
JPS631268(Y2)
申请公布日期
1988.01.13
申请号
JP19820190064U
申请日期
1982.12.16
申请人
发明人
分类号
G04B41/00;(IPC1-7):G04B41/00
主分类号
G04B41/00
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