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发明名称
ELONGATE MINE SUPPORT
摘要
申请公布号
EP0142280(A3)
申请公布日期
1986.05.21
申请号
EP19840307040
申请日期
1984.10.15
申请人
BESTOBELL SOUTH AFRICA LIMITED
发明人
VENTER, DIRK CORNELIUS STEPHANUS
分类号
E21D15/02;E21D15/14;(IPC1-7):E21D15/02
主分类号
E21D15/02
代理机构
代理人
主权项
地址
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