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发明名称
DRILL BIT FOR BORING
摘要
申请公布号
JPS5961689(A)
申请公布日期
1984.04.07
申请号
JP19830137439
申请日期
1983.07.26
申请人
HUGHES TOOL CO
发明人
UIRIAMU ERU SHIEPAADO;FURETSUDO EICHI MAKUERIA
分类号
E21B10/20;E21B10/22;F16B21/18
主分类号
E21B10/20
代理机构
代理人
主权项
地址
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