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Single-screw pvc profile extruder: 1. Screw: screw is made of special steel alloy, and it can be designed for different raw materials. 2. Barrel: barrel is made of special steel alloy, and is equipped with aluminum thermal foil with air cooling system. 3. Gearbox: gears are made of steel alloy with heat treatment and are finished with surface precision grinding. By using oil injection cooling system, it reduces noise when operating under high RPM and enhances the life span of gears. 4. Control[...]