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发明名称
RAIL JOINT BAR
摘要
申请公布号
CA308900(A)
申请公布日期
1931.02.24
申请号
CAD308900
申请日期
申请人
THE RAIL JOINT COMPANY OF CANADA
发明人
VICTOR C. ARMSTRONG
分类号
主分类号
代理机构
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