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发明名称
Improvements relating to machines for cutting coal, rock and the like
摘要
申请公布号
GB371906(A)
申请公布日期
1932.05.02
申请号
GB19300037044
申请日期
1931.02.02
申请人
GEORGE TUCKER JONES;WILLIAM KEMP
发明人
分类号
E21C25/18
主分类号
E21C25/18
代理机构
代理人
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地址
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