portable speed detection

• 测速取证

portable speed detection的用法和样例：

例句

1. Detective departments have the strong power to investigate and get evidence, and even to violate a suspect's legal rights through the abuse of it in the course of detection.
   在侦查阶段的侦查机关所拥有的强大权力是一把双刃剑，既可以用来合法地进行调查取证，也可以被滥用以至于侵犯犯罪人的合法权益。