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发明名称
摘要
申请公布号
JPS482766(U)
申请公布日期
1973.01.13
申请号
JP19710040910U
申请日期
1971.05.20
申请人
发明人
分类号
G09B27/00;G01C17/04;(IPC1-7):G01C17/04
主分类号
G09B27/00
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