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发明名称
METHOD AND DEVICE IN EARTH CUTTING
摘要
申请公布号
ZM1080(A1)
申请公布日期
1982.09.21
申请号
ZM19800000010
申请日期
1980.02.01
申请人
SANDVIK AB
发明人
分类号
E21B7/28;E21B10/16;E21B10/28;E21B10/52;(IPC1-7):E21B1/00
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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