The unit is designed and developed by Licheng Company, with invention patents, and produced by Wuxi Dongfang Machinery Factory. The unit adopts the more advanced new technology of three leveling machines working in series, which has a high degree of automation; It can be used for high quality and high speed flat cutting of steel plates of different thickness and hardness. In particular, the stress of the steel plate itself is uneven and difficult to correct the steel plate and ultra-thin steel plate.