It's newly developed extruder of plate and sheet for project use by our company,L/D ratio scope:35:1-52:1,it's not simply prolonging of the screw,but a totally process of plastic production,it has more than 2 exhaust segments,it has more advantages compared to the traditional single exhaust segment extruder:lower compression segment,higher output,significant of wear for th barrel & screw.longer service life and more profitable.For those customers who require screw & barrel and gearbox critically,the Europran imported products would be a good choice.