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发明名称
AGRICULTURAL DRAINAGE
摘要
申请公布号
IE16509(L)
申请公布日期
1943.10.15
申请号
IE19430000105
申请日期
1943.04.13
申请人
GEORGE WATSON
发明人
分类号
E02B;(IPC1-7):E02B
主分类号
E02B
代理机构
代理人
主权项
地址
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