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发明名称
摘要
申请公布号
JPS482745(U)
申请公布日期
1973.01.13
申请号
JP19710040120U
申请日期
1971.05.18
申请人
发明人
分类号
G03B27/58;G03B27/04;G03B27/62;(IPC1-7):G03B27/04
主分类号
G03B27/58
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