a piece of equipment that presses air into a smaller space so that it can be used under high pressure, for example for filling a tyre

You should also take a tool kit, air compressor (to pump up a flat tyre), first aid kit, and blanket. 你还应该带一个工具包、空气压缩机（为爆胎打气）、急救箱和毯子。

The drill pulverises the rock using high power air compressors. 钻头利用高功率空气压缩机粉碎岩石。