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