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发明名称
摘要
申请公布号
JPS543932(U)
申请公布日期
1979.01.11
申请号
JP19770076466U
申请日期
1977.06.11
申请人
发明人
分类号
G03B1/40;G03B1/04;G03B17/30;(IPC1-7):G03B17/30
主分类号
G03B1/40
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代理人
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