Sprayer is a machine that disperses liquid into a mist, is a kind of machinery, divided into agricultural, medical and other uses (e.g., industrial), agricultural classification of plant protection machinery for agricultural machinery. Generally known as human-powered sprayer, power (engine, motor) driven sprayer. Sprayer according to the working principle of hydraulic, pneumatic and centrifugal sprayer. According to the way of carrying hand-held, backpack, shoulder, pedal, stretcher, cart, self-propelled, vehicle-mounted, suspended, etc., and aviation sprayers.