重钢三厂根据长期生产实践,研制出只用一个双程气缸驱动的可调同步齿条一扇形齿轮传动系统三辊定心新结构——CSD-Ⅰ型多种多样。如美国钢公司1968年建造的液压定心机(图2)是由双活塞液压缸经齿条一扇形齿轮传动的三辊定心机。苏联先后设计 According to the long-term production practice, Chongqing Iron & Steel Plant has developed a new type of three-roller centering system with adjustable gear rack driven by a two-way cylinder. The CSD-Ⅰ is a wide variety. Such as the United States Steel Company built in 1968, hydraulic centering machine (Figure 2) is a dual-piston hydraulic cylinder rack-and-pinion gear driven by a three-roll centering machine. The Soviet Union has designed