1. A mechanical device limiting upward motion of a movable part.; 一種限制可動(dòng)部件向上運(yùn)動(dòng)的機(jī)械裝置. 2. A physical part, usually nonmovable, used to limit or stop the upward travel of the armature in an electromechanical device such as a relay. | 一種物理部件(通常是不可移動(dòng)的)，用來(lái)限制或停止機(jī)電裝置(如繼電器)中銜鐵向上移 動(dòng)的行程.