Features: 1) Hopper bottomed silos are automatic-flow unloaded with quality cleaning system 2) They are widely used for storage of seeds, flour, feed, cement and chemistry, which need to be cleaned continually 3) With solid basic structure the conical- bottom has very strong strength 4) There are three kind of angles, 40 degrees, 45 degrees and 60 degrees, among which the 60 degrees conical-bottom is usually used to store larger pellet and powdered materials of high viscosity 5) It is famous for the automatic-flow unloading way, because it can save resources and costs