Home default The screw L/D ratio is 12: 1, the extruded products have good density. The screw L/D ratio is 12: 1, the extruded products have good density. Pvc Pipe December 09, 2019 Share: Facebook Twitter Pinterest The screw L/D ratio is 12: 1, the extruded products have good density. ... Click to read moreOthers news: Another news: