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发明名称
RAILWAY HATCH COVERS AND LOCKING MEANS THEREFOR
摘要
申请公布号
CA474497(A)
申请公布日期
1951.06.12
申请号
CAD474497
申请日期
申请人
THE YOUNGSTOWN STEEL DOOR COMPANY
发明人
WILFRED A. BEAUCHAMP
分类号
主分类号
代理机构
代理人
主权项
地址
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