... shaft forced mixing system 2.Full automatic and skip hoist 3.High efficientcy. 4.Long working life. 5.ISO/CE/3C ... JS500 is twin shaft compulsory concrete mixer, which can mix subarid rigid concrete, plasticility concrete, flolwability ... , road, bridge, airports, tunnels and other projects.This model concrete mixer is designed reasonable, compact structure, easy to operate and work ...