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发明名称
摘要
申请公布号
JPS548938(U)
申请公布日期
1979.01.20
申请号
JP19770081654U
申请日期
1977.06.21
申请人
发明人
分类号
G03B7/00;G03B9/02;G03B17/00;G03B17/38
主分类号
G03B7/00
代理机构
代理人
主权项
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