emergency brake
noun [ C usually singular ] US uk/ɪˈmɜː.dʒən.si ˌbreɪk/ us/ɪˈmɝː.dʒən.si ˌbreɪk/ (UK handbrake)
手刹，手制动器
a device operated by hand that locks into position and prevents a vehicle from moving
You're supposed to use the emergency brake whenever you stop on a hill. 只要你在山坡上停车都应该把手刹拉上。
Synonym: parking brake