This type of product is commonly known as ND type series wire rope electric hoist. Developed using European FEM design standards, with advanced concept and beautiful appearance, the drive unit adopts the domestic leading point-line meshing gear structure. Operation frequency conversion speed regulation design, small impact, can achieve precise positioning; equipped with an intelligent safety operation monitoring recorder similar to the "black box" of an aircraft, which can continuously record the working status information of the crane and prevent the illegal operation of the crane. The whole machine adopts a maintenance-free design, with few wearing parts and convenient maintenance.