Internal Combustion Rock Drill 1)advanced equipment 2)excellent quality 3)good Service 4)Excellent working condition Internal Combustion Rock Drill The Internal Combustion Rock Drill Type YN 27C has functions of drillhole,cleavage, bruising, tamping and chiseling. It is widely used in mine, road construction,quarrying, national defence works, etc.TECHNICAL SPECIFICATIONSWeight of main machine27 ...