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发明名称
摘要
申请公布号
JPS57157940(U)
申请公布日期
1982.10.04
申请号
JP19810045687U
申请日期
1981.03.31
申请人
发明人
分类号
G03B17/02;(IPC1-7):G03B17/02
主分类号
G03B17/02
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代理人
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