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发明名称
RAILWAY RESILIENT TRACK
摘要
申请公布号
CA328268(A)
申请公布日期
1932.12.06
申请号
CAD328268
申请日期
申请人
THE CANADIAN GYPSUM COMPANY
发明人
WILLIAM M. MCNEIL;IRA G. ROSS
分类号
主分类号
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