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发明名称
PICCONI MINERARI
摘要
申请公布号
IT1196248(B)
申请公布日期
1988.11.16
申请号
IT19840022585
申请日期
1984.09.10
申请人
BOART INTERNATIONAL LTD
发明人
HOLDEN FREDERICK GEORGE;COOPER ROY
分类号
E21B10/56;E21C35/18;E21C35/183;(IPC1-7):E21C/
主分类号
E21B10/56
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代理人
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