... is suitable for producing 2-layer or multiple-layer tri-side sealing composite film bag (for foods, laundry detergent, ... of temperature limit, etc.4. LPC automatic deviation-rectifying, double photoelectric tracking.5. Computer 16-route PID constant temperature ... rim charge, electrostatic elimination.7. Technology of double self-standing pouch, double concave-convex buckle device is in the lead ...