In 2010, Shaoguan Hydraulics successfully manufactured small-compartment servo hydraulic oil cylinders on 340 continuous rolling mills possessed by Hengyang Steel Tube (Group) Co., Ltd. (complete sets of the cylinders were originally provided by German SMS company). Thus, it broke the monopolization of foreign technology. According to the practical working conditions of the servo hydraulic cylinders and requirements of different measuring, control devices, Shaoguan Hydraulics used its advanced process, production technology for design of advanced seal structure, and was praised by users. On tube rolling mill, the localized servo hydraulic cylinders can be perfect substitutes for the imported ones.