The HL-220E12 electric valve hall work truck produced by Holland Holandlift Company is a machine suitable for indoor use. The main feature is "narrow", the width of the entire machine is only 1.2 meters; the working height is 21.7 meters and the load capacity is 500 Kg, using full-scale control technology; equipped with traceless tires, it can easily travel in small indoor spaces, and is a compact, flexible and convenient valve hall operation vehicle.