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经营范围
发明名称
Mining machine
摘要
申请公布号
US2551510(A)
申请公布日期
1951.05.01
申请号
US19460682566
申请日期
1946.07.10
申请人
MAVOR & COULSON, LIMITED
发明人
SPROUL JOHN CONNEL
分类号
E04H6/00;E21C25/30
主分类号
E04H6/00
代理机构
代理人
主权项
地址
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