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经营范围
发明名称
Excavating apparatus
摘要
申请公布号
US2144246(A)
申请公布日期
1939.01.17
申请号
US19370171108
申请日期
1937.10.26
申请人
EDWIN LONG JOHN
发明人
LONG JOHN EDWIN
分类号
E02F3/342
主分类号
E02F3/342
代理机构
代理人
主权项
地址
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