emergency brake
noun/ɪˈmɜːdʒənsi breɪk/
/ɪˈmɜːrdʒənsi breɪk/
enlarge image(also parking brake (both North American English), handbrake especially in British English)a brake in a vehicle that is operated by hand, designed to be used when the vehicle has already stopped（车辆的）手闸，手刹 - a brake on a train that can be pulled in an emergency
（火车的）紧急刹车