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发明名称
INSTRUMENT FOR HOLDING PROPER DISTANCE BETWEEN BOOK AND EYE AT TIME OF STUDY
摘要
申请公布号
JPS62290455(A)
申请公布日期
1987.12.17
申请号
JP19860132397
申请日期
1986.06.06
申请人
SHINOHARA TOSHIYUKI
发明人
SHINOHARA TOSHIYUKI
分类号
A47B17/00;A61F5/01
主分类号
A47B17/00
代理机构
代理人
主权项
地址
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