| 词汇 | pneumatic drill | 
| 释义 | pneumatic drill  noun [ C ] uk/njuːˌmæt.ɪk ˈdrɪl/ us/nuːˌmæt̬.ɪk ˈdrɪl/ (US also jackhammer)  风钻 a powerful tool that is held in the hand and operates by air pressure, used for breaking hard surfaces such as roads | 
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