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发明名称
Improvements in or relating to mining machines
摘要
申请公布号
GB580650(A)
申请公布日期
1946.09.16
申请号
GB19440007877
申请日期
1944.04.27
申请人
ALEXANDER ANDERSON;ANDERSON, BOYES & COMPANY LIMITED
发明人
分类号
E21C29/10
主分类号
E21C29/10
代理机构
代理人
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