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发明名称
Drafting apparatus
摘要
申请公布号
US2999317(A)
申请公布日期
1961.09.12
申请号
US19570673191
申请日期
1957.07.22
申请人
ALDERSON RESEARCH LABORATORIES, INC.
发明人
ALDERSON SAMUEL W.
分类号
B43L13/02
主分类号
B43L13/02
代理机构
代理人
主权项
地址
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