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摘要
申请公布号
JPS5246738(Y2)
申请公布日期
1977.10.24
申请号
JP19730097378U
申请日期
1973.08.20
申请人
发明人
分类号
G03B31/00;G03B31/02;(IPC1-7):G03B31/02
主分类号
G03B31/00
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