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经营范围
发明名称
Improvements in mining machines
摘要
申请公布号
GB675557(A)
申请公布日期
1952.07.16
申请号
GB19490002969
申请日期
1949.02.03
申请人
MAVOR & COULSON, LIMITED;ALEXANDER MCGILP MUNRO
发明人
分类号
E21C29/02;E21D9/06
主分类号
E21C29/02
代理机构
代理人
主权项
地址
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