disc of hyperbolic section

... disc of constant thickness 等厚度叶轮 disc of hyperbolic section 双曲线剖面叶轮 disc oil separator 碟式油分离器 ...

... disc of constant thickness 等厚度轮盘 disc of hyperbolic section 双曲线截面叶轮 disc of variable profile 变截面轮盘 ...