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经营范围
发明名称
Mining machine
摘要
申请公布号
US2626139(A)
申请公布日期
1953.01.20
申请号
US19500144745
申请日期
1950.02.17
申请人
MAVOR & COULSON, LIMITED
发明人
TOWLER JOHN MAURICE
分类号
E21C29/02
主分类号
E21C29/02
代理机构
代理人
主权项
地址
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