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发明名称
摘要
申请公布号
JPS5680508(U)
申请公布日期
1981.06.30
申请号
JP19790161808U
申请日期
1979.11.24
申请人
发明人
分类号
G02B27/22;G02B27/02;G03B35/18;(IPC1-7):G02B27/02
主分类号
G02B27/22
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