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发明名称
CORRUGATED CULVERT
摘要
申请公布号
CA336564(A)
申请公布日期
1933.10.24
申请号
CAD336564
申请日期
申请人
FREDERICK J. WALKER
发明人
FREDERICK J. WALKER
分类号
主分类号
代理机构
代理人
主权项
地址
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