钻头: boring crown; bore bit; dril ...异常: unusual; abnormal; anomalous ...磨损: wear and tear; abrasive wear ...异常磨损: abnormal wear; inordinate wear钻头导常磨损: bit unfavorable wear钻头正常磨损: bit uniform wear非正常磨损: heel and toe wear正常磨损: normal wear头异常小的: microcephalous异常磨耗: abnormal friction先天性头异常: congenital anomaly of head胎面异常磨耗: abnormal tread wear钻头磨损: bit wear常磨: tsunema正常磨损和自然损耗: fair water and tear gradual deterioration异常牙磨损: abnormal tooth wear钻头过度磨损: bit excessive wear钻头过早磨损: premature bit failure钻头磨损等级: bit grading钻头磨损分析: bit dullness analysis钻头磨损特征: dull bit appearance钻头外侧磨损: junk damage钻头直径磨损: bit gage wear; gauge loss of bit钻头工况异常: odd bit behavior修补破洞因而明显不属于正常磨损范围: patch holed
