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经营范围
发明名称
Excavating apparatus and method
摘要
申请公布号
GB753917(A)
申请公布日期
1956.08.01
申请号
GB19540012819
申请日期
1954.05.03
申请人
THE UNITED ELECTRIC COAL COMPANY
发明人
KOLBE FRANK FREDERICK
分类号
E02F3/18;E02F3/20;E21C47/00
主分类号
E02F3/18
代理机构
代理人
主权项
地址
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