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发明名称
PROCESSO DE MINERACAO
摘要
申请公布号
BR8104624(A)
申请公布日期
1982.04.06
申请号
BR19810004624
申请日期
1981.07.17
申请人
BOART INT LTD
发明人
WESTHUIZEN WYNAND J;HOPLEY ROBERT J
分类号
E21C41/16;(IPC1-7):E21C41/06
主分类号
E21C41/16
代理机构
代理人
主权项
地址
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