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发明名称
Irrigation control gate
摘要
申请公布号
US2257626(A)
申请公布日期
1941.09.30
申请号
US19390300614
申请日期
1939.10.21
申请人
VALLEY CONCRETE PIPE & PRODUCTS COMPANY
发明人
THOMSON JOHN S.
分类号
E02B13/00;F16K3/02
主分类号
E02B13/00
代理机构
代理人
主权项
地址
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