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发明名称
Railroad-highway crossing construction
摘要
申请公布号
US2471167(A)
申请公布日期
1949.05.24
申请号
US19450635159
申请日期
1945.12.15
申请人
OXENRIDER ELLIS C
发明人
OXENRIDER ELLIS C.
分类号
E01C9/04
主分类号
E01C9/04
代理机构
代理人
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地址
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