jǐng chá zài zhí xíng rèn wù shí yǒu shí huì pèi bèi shuǎi gùn zuò wéi zì wèi gōng jù.

警察在执行任务时有时会配备甩棍作为自卫工具。

Police officers sometimes carry expandable batons as self-defense tools when on duty.