对调速系统静特性曲线的最大非线性度一般有哪些要求?
参考答案:
调速系统静特性曲线的最大非线性度一般不允许超过5%,且当测点的1/4不在曲线上时此次实验无效。
Neglecting friction,you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use().
A.Gun tackle
B.Luff tackle
C.Two-fold tackle
D.Double-luff tackle
车辆的维护分为日常维护、一级维护、二级维护、()及走合维护。