1.have a feature of solid smart without distortion and anti-erode of acid and alkali.2.the air-puma installed in the tank.so can avoid touching plants and damaging crops and hurt people due to overload of empty chamber when use it.made this sprayer more safe and reliable.3.good material for sealing pieces against abrasion.corrosion and have a good sealing and long service life.4.each sprayer have configured with spraying head(be fitted for using in different tasks).that can meet allintervals according to different crops.5.knapsack pressure sprayer.economic,safe and efficient with the characteristics of bearing comfortably.handling tightly and spraying evenly.