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经营范围
发明名称
Perspective drafting machine
摘要
申请公布号
US2714253(A)
申请公布日期
1955.08.02
申请号
US19520279678
申请日期
1952.03.31
申请人
STONE IRVING S
发明人
STONE IRVING S.
分类号
B43L13/14
主分类号
B43L13/14
代理机构
代理人
主权项
地址
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