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发明名称
摘要
申请公布号
JPS543931(U)
申请公布日期
1979.01.11
申请号
JP19770076385U
申请日期
1977.06.10
申请人
发明人
分类号
G03B17/04;G03B17/12;(IPC1-7):G03B17/12
主分类号
G03B17/04
代理机构
代理人
主权项
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