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经营范围
发明名称
Mining apparatus
摘要
申请公布号
US2194466(A)
申请公布日期
1940.03.26
申请号
US19370159021
申请日期
1937.08.13
申请人
MINERAL CUTTING MACHINE COMPANY, INC.
发明人
CADWALLADER EDGAR M.
分类号
E21C25/58
主分类号
E21C25/58
代理机构
代理人
主权项
地址
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