警犬
1. 巡逻警犭：patient under escort 押解前来的病人;在警务人员陪同下前来的病人 | patrol dog 巡逻警犭 | patrol launch 巡逻警轮
1. Police and dog handlers have been drafted in to patrol the perimeter fence and the number of security guards has been trebled.
2. Regular dog patrols are just one part of a new police patrol system that was launched in the district at the beginning of the year.