1Semi-automatic Pipe Cutting Machine. 2Pneumatic Control Circular Sawing Machines. 3Productive with High Flexible & Accuracy CNC Metal circular saw machine1 Air ... operated,the hydrauic pressure has the automatic feed,the chucking automatic installment,the movement is ... ,275,300,315300,315,350350,400,455 Pneumatic Automatic Circular Cold Sawing Machine