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发明名称
Improvements in mole-draining implements, commonly called mole-drainers or mole-ploughs
摘要
申请公布号
GB558464(A)
申请公布日期
1944.01.06
申请号
GB19420007760
申请日期
1943.05.15
申请人
ERNEST CARR CHILDS
发明人
分类号
E02B11/02;E02F5/10
主分类号
E02B11/02
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