headway per drill bit
英 [ˈhedweɪ pə(r) drɪl bɪt]
美 [ˈhedweɪ pər drɪl bɪt]
网络 钻头进尺
双语例句
- For six tested bits, under same conditions, the average penetration rate has been raised by 42.48% and the average headway per drill bit has increased by 23 1%.
在相同条件下，试验的六只钻头平均机械钻速提高4248%，单只钻头进尺平均提高231%。