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发明名称
摘要
申请公布号
JPS5857839(U)
申请公布日期
1983.04.19
申请号
JP19810152905U
申请日期
1981.10.16
申请人
发明人
分类号
G03B21/14;G03B21/20;(IPC1-7):G03B21/20
主分类号
G03B21/14
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