sand maker: 1,efficient sand maker 2,6 monthts warranty,delivery in 25 workdays 3,make 0-1cm sand 4,ISO9001:2008,new machine ZSJ Double rotor sand making machineAccording to the using status of sand making equipment , the advice and requirements of many clients in sand making industry ,the research specialist staff of our company successfully developed the ZSJ double rotor hammer sand making ...