... working have double-acting function piston pump.2.Can delivery various material,like cement,yelow mud,soluble ... rate.Reliable function.3.Easy to maintain.Small, can move,convenience in use.4.No expensive.5.High quality ... .Have sell for more than 10 years.Your can trust us. Usage:1.Grouting in Tunnel,mine ... transportation pump,ect.. If you're interested in my goods,please contact me,I am Mandy zhang,will ...