Rolling stock . leaf springs . leaves with variable cross - section for parabolic springs 铁路车辆.片簧.抛物状弹簧用可变截面的弹簧片
6.
Application of elastic variable - section pressure - equalizing groove in the structural design of high - stiffness aerostatic thrust bearing 用可变截面均压槽实现高刚度空气静压轴承的结构设计