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发明名称
AIR BRAKE SYSTEM
摘要
申请公布号
CA299774(A)
申请公布日期
1930.04.29
申请号
CAD299774
申请日期
申请人
THE ROYAL RAILWAY IMPROVEMENT CORPORATION
发明人
WILLIAM H. SAUVAGE
分类号
主分类号
代理机构
代理人
主权项
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