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发明名称
摘要
申请公布号
JPS57201534(U)
申请公布日期
1982.12.22
申请号
JP19810089992U
申请日期
1981.06.17
申请人
发明人
分类号
G03B9/02;G03B9/24;G03B19/12;(IPC1-7):G03B19/12
主分类号
G03B9/02
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