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发明名称
FLOW CONTROLLING IRRIGATION INSTALLATION FOR AN UNLINED DITCH
摘要
申请公布号
US3439506(A)
申请公布日期
1969.04.22
申请号
USD3439506
申请日期
1967.08.25
申请人
WILLIS W. MARTIN
发明人
WILLIS W. MARTIN
分类号
E02B13/00
主分类号
E02B13/00
代理机构
代理人
主权项
地址
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