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发明名称
Rigid frame bridge and method of making the same
摘要
申请公布号
US2373072(A)
申请公布日期
1945.04.03
申请号
US19410407437
申请日期
1941.08.19
申请人
WICHERT ERNEST M
发明人
WICHERT ERNEST M.
分类号
E01D1/00;E01D2/00
主分类号
E01D1/00
代理机构
代理人
主权项
地址
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