Five-axis NC machine tool with small pendulum Angle table can not carry out continuous cutting of the part of centrifugalturbine because of the structure of machine tool.
由于工作台摆动角度受机床结构的限制，小摆角五坐标数控机床不能直接进行离心叶轮的连续加工。
2
Placing a lidar in the centre of a turbine proved difficult, because of the centrifugal force generated by the turbine’s rotation.
由于涡轮旋转所产生的离心力，在一个涡轮的中心安置一个激光雷达是困难的。
3
A brief presentation on computer aided hydraulic design of Francis Turbine runners is given, the general principle of which are also applicable to centrifugal and mixed flow pump runners.