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发明名称
ROVING DRAWING APPARATUS
摘要
申请公布号
CA375045(A)
申请公布日期
1938.07.12
申请号
CAD375045
申请日期
申请人
H AND B AMERICAN MACHINE COMPANY
发明人
EDWARD L. MARTIN
分类号
主分类号
代理机构
代理人
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