SZG-32rail drill machine: 1.the biggest drilling diameter: 32 2.PATENT 3.CRCC Detailed product\'s describe: 1.Patent 2.CRCC 3.weight :8kg Other Information SZG - 32 type hand rail drilling machine is suitable for railway electricity, maintenance, overhaul and other departments to places where no power supply of various types of rail drilling operation. It is simple in structure, loading and unloading convenient, small volume, light weight and portable. Has the explosion protection function, especially suitable for oil depot, flammable, explosive railway location operation.