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发明名称
ROTOR BIT
摘要
申请公布号
JPH0224475(A)
申请公布日期
1990.01.26
申请号
JP19890084141
申请日期
1989.04.04
申请人
SANDVIK AB
发明人
HARII RENNAATO KARURUTSUSON
分类号
E21B10/50;E21B10/22;E21B10/25;F16J15/32
主分类号
E21B10/50
代理机构
代理人
主权项
地址
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