钻头: boring crown; bore bit; dril ...过度: excessive; over; undue; ana- ...磨损: wear and tear; abrasive wear ...过度磨损: abnorm hoeher verschleiss; excessive wear; over wear=overwear; overwear过度磨损的: over worn钻头过早磨损: premature bit failure钻头过度使用: overuse of bit; overuses of bit过度磨耗: excessive wear过度磨碎: overgrinding牙过度磨耗: excessive attrition of teeth胎头过度仰伸: hyperextension of fetal head反刍兽齿过度磨耗: dental attrition of ruminants钻头磨损: bit wear过度的磨损: undue wear磨损过度: totally worn out钻头导常磨损: bit unfavorable wear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钻头异常磨损: bit unfavorable wear钻头正常磨损: bit uniform wear钻头直径磨损: bit gage wear; gauge loss of bit磨损报废的钻头: throwaway bit钻头磨损指示器: dull bit indicator