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发明名称
摘要
申请公布号
JPS5257648(U)
申请公布日期
1977.04.26
申请号
JP19760135349U
申请日期
1976.10.07
申请人
发明人
分类号
G03B21/11;G03B1/00;(IPC1-7):G03B21/11
主分类号
G03B21/11
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代理人
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