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发明名称
摘要
申请公布号
JPH0548149(Y2)
申请公布日期
1993.12.20
申请号
JP19900043731U
申请日期
1990.04.24
申请人
发明人
分类号
G04B45/00;A63H3/04;A63H3/50;G04B43/00;(IPC1-7):G04B43/00
主分类号
G04B45/00
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