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经营范围
发明名称
Improvements relating to machines for mining coal and other minerals
摘要
申请公布号
GB970054(A)
申请公布日期
1964.09.16
申请号
GB19610012097
申请日期
1961.04.05
申请人
MAVOR & COULSON LIMITED
发明人
JERRIT GEORGE
分类号
E21C35/20
主分类号
E21C35/20
代理机构
代理人
主权项
地址
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