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发明名称
Прибор для вычерчивания кардиоидальных кривых четвертого порядка
摘要
申请公布号
SU21458(A1)
申请公布日期
1931.07.31
申请号
SU19300062237
申请日期
1930.01.12
申请人
OLSHVANG A.V.
发明人
OLSHVANG A.V.
分类号
B43L11/00
主分类号
B43L11/00
代理机构
代理人
主权项
地址
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