... drill from china type:YT24,YT28,YN30,YN30A,YN30E,YN27,YN27C,YN27T certificate:ISO9001,CE super air /petrol ... tool, composed of a small petrol engine, an air compressor and a rock drill. 2. During operation, ... mountains, and places with no power supply and air compressing equipment, and especially suits the temporary projects ... cold as forty degrees below zero Air /petrol /electric rock drill from china