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发明名称
Drafting t-square
摘要
申请公布号
US2078601(A)
申请公布日期
1937.04.27
申请号
US19350046772
申请日期
1935.10.25
申请人
CUTTING RICHARD H
发明人
CUTTING RICHARD H.
分类号
B43L13/04
主分类号
B43L13/04
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