The trough is the maximum negative amplitude or downwarddeflection of the wave.
波谷是子波最大负振幅或向下的偏离。
2
For any C. G. position, an increase in trim speed from any initial value to a larger one requires a downwarddeflection of the elevator.
对于任意一个重心位置，平衡速度由它的初始值变化到较大的值时要求升降舵向下偏转。
3
In recent years, remedy of main girder's downwarddeflection of OTC by pre-stress method has found wide spread application. This is also the common practice iu Wu Hun district.