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发明名称
Improvements in agricultural drainage
摘要
申请公布号
GB556283(A)
申请公布日期
1943.09.28
申请号
GB19420004947
申请日期
1942.04.15
申请人
GEORGE WATSON
发明人
分类号
E02B11/02;E02F5/10
主分类号
E02B11/02
代理机构
代理人
主权项
地址
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