vt.大移动(再调整)
n.超程
This control effect can be got by designing the size of pokedwheel,using the self locking character of worm wheel and worm pole and connecting the pawl mechanism with overtravel ... 通过有效设计拨轮的尺寸，利用蜗轮蜗杆的自锁特性，将棘轮机构与行程开关联为一体，达到自动输球控制的目的。
Analysis on Electrical Endurance Forecast Based on the Decrease of Overtravel Time of Electromagnetic Relay 电磁式继电器超程时间减少对电寿命的影响
release overtravel 衔铁释放超行程
switch overtravel 开关越程
overtravel protection 超程保护
