CNC Metal pipe cutting machine 1 Air operated,hydraulic. 2 Has the circulating coolong system 3 Burr free,no dusty CNC Metal pipe cutting machine1 Air ... operated,the hydrauic pressure has the automatic feed,the chucking automatic installment,the movement ... ,300250,275,300,315300,315,350350,400,455 YJ-350YNC Automatic Metal pipe cutting machine