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经营范围
发明名称
Mining apparatus
摘要
申请公布号
GB2346631(B)
申请公布日期
2003.04.02
申请号
GB19990027848
申请日期
1999.11.26
申请人
* JOY MM DELAWARE, INC.
发明人
JOHN R * FREDERICK;KEVIN ROSS * HALL;GREGORY S * WILSON
分类号
E21C27/24;E21C31/10;E21C33/00;E21D9/12;E21D19/04;(IPC1-7):E21D9/10
主分类号
E21C27/24
代理机构
代理人
主权项
地址
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