pneumatic

柯林斯詞典

1. ADJ A pneumatic drill is operated by air under pressure and is very powerful. Pneumatic drills are often used for digging up roads. (鉆頭)氣動的; 風(fēng)動的[ADJ n]
...the sound of a pneumatic drill hammering away. ...風(fēng)鉆鉆個(gè)不停的轟鳴聲。
2. ADJ Pneumatic means filled with air. 充氣的[ADJ n]
...pneumatic tyres. ...充氣輪胎。