钻头: boring crown; bore bit; dril ...外侧: outboard磨损: wear and tear; abrasive wear ...环槽侧磨损: ring groove side wear乳头外侧核: nucleus mammillaris lateralis头外侧直肌: rectus capitis lateralis钻头外型: bit contour钻头外形: bit contour侧磨: side grinding刮刀钻头外缘刃: gauge edge量钻头外径的圆环: bit ring钻头磨损: bit wear钻头导常磨损: bit unfavorable 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钻头牙齿磨损程度: bit-tooth dullness钻头直径磨损量: drill bit gage loss