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发明名称
摘要
申请公布号
JPS6239379(Y2)
申请公布日期
1987.10.07
申请号
JP19790175324U
申请日期
1979.12.18
申请人
发明人
分类号
G03B1/12;G03B17/00;G03B17/42;(IPC1-7):G03B17/00
主分类号
G03B1/12
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