N-COUNT (用于钳锁非法停放车辆的)丹佛锁箍，丹佛锁扣 A Denver boot is a large metal device which is fitted to the wheel of an illegally parked car or other vehicle in order to prevent it from being driven away. The driver has to pay to have the device removed. (用于钳锁非法停放车辆的)丹佛锁箍，丹佛锁扣 [US]
in BRIT, use 英国英语用 clamp, wheel clamp