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发明名称
摘要
申请公布号
JPH0648497(Y2)
申请公布日期
1994.12.12
申请号
JP19870144556U
申请日期
1987.09.21
申请人
发明人
分类号
G03B17/00;G03B17/04;(IPC1-7):G03B17/00
主分类号
G03B17/00
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