... ISO,CE Compulsory Twin-Shaft MixerJS-500 This Mixer can force mix plasticity, low plasticity, rigid and various kinds of concrete and sand ... ISO9000,ISO90001,14000,CEmarks4,Economic investment Main techonogy parameters of Concrete Mixer JS-500: 1.Model:JS-500 2.Material outputting ... Productivity:20-25m³/h CONTRACT MOB: 0086-15059897772 0086-13960296321 Twin-Shaft Concrete Mixer JS500(Mixing Machine)