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发明名称
摘要
申请公布号
JPS5615584(Y2)
申请公布日期
1981.04.11
申请号
JP19740152317U
申请日期
1974.12.15
申请人
发明人
分类号
G04B19/00;G04B19/16;(IPC1-7):G04B19/00
主分类号
G04B19/00
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