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发明名称
Improvements in or relating to mining machines
摘要
申请公布号
GB521915(A)
申请公布日期
1940.06.04
申请号
GB19380034588
申请日期
1938.11.28
申请人
NEWTON, CHAMBERS & COMPANY LIMITED;OSWALD FLOYD LEWIS
发明人
分类号
E21C27/04
主分类号
E21C27/04
代理机构
代理人
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