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发明名称
Improvements in or connected with mining machines
摘要
申请公布号
GB536835(A)
申请公布日期
1941.05.28
申请号
GB19390031693
申请日期
1939.12.07
申请人
MAVOR AND COULSON, LIMITED;WILLIAM ARCHIBALD LOGAN
发明人
分类号
E21C27/02
主分类号
E21C27/02
代理机构
代理人
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