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发明名称
摘要
申请公布号
JPS56164236(U)
申请公布日期
1981.12.05
申请号
JP19810001017U
申请日期
1981.01.08
申请人
发明人
分类号
G03B23/00;G03B21/00;(IPC1-7):G03B21/00
主分类号
G03B23/00
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