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发明名称
摘要
申请公布号
JPH0440230(U)
申请公布日期
1992.04.06
申请号
JP19900082049U
申请日期
1990.07.31
申请人
发明人
分类号
G03B17/38;H04Q9/00;(IPC1-7):G03B17/38
主分类号
G03B17/38
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