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经营范围
发明名称
MEJORAS EN DISPOSITIVOS DE MINERIA
摘要
申请公布号
AR211714(A1)
申请公布日期
1978.02.28
申请号
AR19760265224
申请日期
1976.10.26
申请人
EDONVALE ENG WORKS LTD
发明人
分类号
E21B7/28;E21C25/58;E21C41/16;E21C41/22;E21D9/12;(IPC1-7):E21B25/00
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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