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发明名称
Drafting instrument
摘要
申请公布号
US2908082(A)
申请公布日期
1959.10.13
申请号
US19530377182
申请日期
1953.08.28
申请人
DOLGORUKOV GREGORY S
发明人
DOLGORUKOV GREGORY S.
分类号
B43L13/04
主分类号
B43L13/04
代理机构
代理人
主权项
地址
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