delay line
noun
1- a device producing a specific desired delay in the transmission of a signal延迟线。
1.1
- historical a plate, wire, or mercury column used to store an electrical impulse in a valve computer〈史〉存储线。
1.2
- a set of mirrors controlling the path lengths between outlying telescopes and a central receiver（控制外层空间望远镜与中央接收器之间光程的）延迟线。