The output current is never influenced by power supply, realizing the invariableness of load current.

输出电流不受供电电压波动的影响，实现了电路的恒流功能。

Tiny deformation will appear in the local of the propeller shaft of certain ship which is endured an invariableness load, although the shaft stress is within the elastic limit range.

某舰的螺旋桨尾轴长期处在恒定载荷作用下，虽然尾轴应力在弹性极限范围内，但是尾轴局部还是很容易发生微量的塑性变形。