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发明名称
摘要
申请公布号
JPS5260331(U)
申请公布日期
1977.05.02
申请号
JP19750146905U
申请日期
1975.10.27
申请人
发明人
分类号
G03B13/36;G02B7/28;G03B13/12;G03B17/12;(IPC1-7):G03B13/12
主分类号
G03B13/36
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