... ×21.8-2.20.75+2.27.5520 φ6-10 With sawdust, crop straw (corn stalks, sorghum stalk, soybean stalk, ... technology: German gun drill and vacuum furnace heat manufacturing process, with high-quality and long service life alloy steel ring die ... smooth and of high quality. International advanced power transfer coupling with innovative, compact structure and safe, low-noise, low-fault performance. Biomass ...