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发明名称
摘要
申请公布号
JPS5283739(U)
申请公布日期
1977.06.22
申请号
JP19750170845U
申请日期
1975.12.18
申请人
发明人
分类号
G03B21/64;G03B21/11;(IPC1-7):G03B21/64
主分类号
G03B21/64
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代理人
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