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发明名称
Rail
摘要
申请公布号
US2056729(A)
申请公布日期
1936.10.06
申请号
US19320639086
申请日期
1932.10.22
申请人
LEISNER PAUL W;LOCKARD BERNARD M
发明人
LEISNER PAUL W.;LOCKARD BERNARD M.
分类号
E01B5/02
主分类号
E01B5/02
代理机构
代理人
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地址
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