A multi posture lifting machinery used for vertically lifting and transporting goods within a certain area. Also known as a crane. Belonging to raw material loading and unloading machinery and equipment. The operational characteristic of a crane is to carry out intermittent fitness exercises during a working period, that is, to replace the corresponding operating principles such as raw material collection, transfer, and unloading. The key components include lifting mechanism, actual operating mechanism, rotating mechanism, and metal components. The lifting mechanism is the basic working mechanism of a crane, which is mainly composed of lifting system software and hoisting winches. It can also use hydraulic transmission systems to lift objects. The actual operating mechanism is used to vertically and horizontally transport suspended objects or adjust the working parts of the crane. It is generally composed of an electric motor, a reducer, a braking system, and tires. The amplitude conversion mechanism is only installed on the heavy arm. When the arm tilts, the amplitude decreases, and when the arm bends, the amplitude increases. It can be divided into two types: balanced amplitude and unbalanced amplitude. The rotating mechanism is used to rotate the boom. It consists of a driver device and a rotary bearing device. Metal components are the frame of cranes, and key load-bearing components such as highway bridges, telescopic arms, and door frames can be box shaped or bent frame structures, as well as beam end structures, and some can be used as beam slabs.