Winch is also called the winch by human or mechanical power-driven reel, winding the rope to complete the traction device. Vertical lifting, horizontal or inclined tractor heavy objects simple lifting machinery. Divided into two kinds of manual and electric. 
 The electric winch motors, couplings, brakes, gear box and reel mounted in the rack. Since the lifting height and loading capacity, busy, requiring speed performance, in particular the empty hook rapid decline. In place or sensitive materials, micro-rate decline. 
 Circulation tonnage currently on the market, according to their uses, winch, it is called, commonly referred to as: electric hoist, manual hoist, construction hoist, frequency conversion hoist speed hoist, non-standard hoist for :1-25T. 
 High versatility of the product, compact structure, small size, light weight, major and facilitate the use of transfer, are widely used in construction, water conservancy, forestry, mining, docks, material lift or drag, but also for modern electronic control automatic operation of the line equipment.