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发明名称
摘要
申请公布号
JPH0420032(U)
申请公布日期
1992.02.19
申请号
JP19900062356U
申请日期
1990.06.13
申请人
发明人
分类号
G03B21/56;(IPC1-7):G03B21/56
主分类号
G03B21/56
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