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发明名称
Improvements in or relating to coal and like cutting machines
摘要
申请公布号
GB404214(A)
申请公布日期
1934.01.11
申请号
GB19330018624
申请日期
1933.06.30
申请人
AUSTIN HOPKINSON
发明人
分类号
E21C25/34
主分类号
E21C25/34
代理机构
代理人
主权项
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