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发明名称
RAILWAY DRAFT RIGGING
摘要
申请公布号
CA323552(A)
申请公布日期
1932.06.21
申请号
CAD323552
申请日期
申请人
THE SYMINGTON COMPANY
发明人
DONALD S. BARROWS
分类号
主分类号
代理机构
代理人
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地址
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