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发明名称
Учебное наглядное пособие по начертательной геометрии
摘要
申请公布号
SU82844(A1)
申请公布日期
1949.11.30
申请号
SU19490404532
申请日期
1949.09.21
申请人
LITSIN L.N.
发明人
LITSIN L.N.
分类号
G09B23/04
主分类号
G09B23/04
代理机构
代理人
主权项
地址
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