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经营范围
发明名称
MINING MACHINE
摘要
申请公布号
GB2169941(B)
申请公布日期
1987.12.02
申请号
GB19860000461
申请日期
1986.01.09
申请人
* DRESSER U K LIMITED
发明人
WILLIAM * ASKEW
分类号
E21C27/02;E21C31/10;(IPC1-7):E21C31/02
主分类号
E21C27/02
代理机构
代理人
主权项
地址
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