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发明名称
INSULATED RAIL JOINTS
摘要
申请公布号
CA470976(A)
申请公布日期
1951.01.23
申请号
CAD470976
申请日期
申请人
RALPH W. PAYNE
发明人
RALPH W. PAYNE
分类号
主分类号
代理机构
代理人
主权项
地址
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