描述
比例度P值变化的影响，比例度越大，说明比例作用越弱，使过渡过程曲线变化缓慢；振荡周期加长；衰减比变大。因此在有干扰或改变给定值使曲线恢复缓慢时，可将比例度P值变小。
Wild Heerbrugg M3 Stereo Microscope
wild heerbrugg T-1 theodolite with precision distomat
Wild Heerbrugg Theodolite T2-128760
Wild Heerbrugg Binocular Microscope Working Light
Wild Heerbrugg Binocular Microscope With 3 Objectives
WILD HEERBRUGG Leica Stereomicroscope M3Z Leica M3Z
Wild Heerbrugg Makrozoom 1:5 lense
WILD HEERBRUGG THEODOLITE W/CASE SURVEY SWITZERLAND
Wild Heerbrugg Binocular M12 Microscope
