钻头必须缓慢转动，以保证钻孔平整光滑。The drill should be slowly rotated to ensure a clean hole.打钻和提钻时要保持钻头平稳。Keep the drill steady while it ascends and descends.你得拆开这个钻头。You'll have to disassemble the drill....

“钻头”的英语可以翻译为：oring crown，bore bit，drilling bit，[机] bit (of a drill)，aiguille ...

“钻头”的拼音为：zuàn tóu...