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发明名称
Boulier pour l'instruction de jeunes élèves
摘要
申请公布号
CH319605(A)
申请公布日期
1957.02.28
申请号
CHD319605
申请日期
1954.07.08
申请人
ROCHE,LOUIS-JOSEPH
发明人
ROCHE,LOUIS-JOSEPH
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
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