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发明名称
Improvements in or relating to the breaking down of coal or like minerals
摘要
申请公布号
GB504940(A)
申请公布日期
1939.05.02
申请号
GB19370029998
申请日期
1937.11.02
申请人
JAMES TAYLOR;IMPERIAL CHEMICAL INDUSTRIES LIMITED
发明人
分类号
E21C37/08
主分类号
E21C37/08
代理机构
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