pneumatic

柯林斯词典

1. ADJ A pneumatic drill is operated by air under pressure and is very powerful. Pneumatic drills are often used for digging up roads. (钻头)气动的; 风动的[ADJ n]
...the sound of a pneumatic drill hammering away. ...风钻钻个不停的轰鸣声。
2. ADJ Pneumatic means filled with air. 充气的[ADJ n]
...pneumatic tyres. ...充气轮胎。