1Semi-automatic Pipe Cutting Machine. 2Pneumatic Control Circular Sawing Machines. 3Productive with ... saw machine1 Air operated,the hydrauic pressure has the automatic feed,the chucking automatic installment,the movement is steady,the operation is simple ... ,275,300250,275,300,315300,315,350350,400,455 Pneumatic Automatic Circular Cold Sawing Machine