Study of passive q - switched unit of ndyag laser using ion - implanted gaas 離子注入sigaas做激光器被動調(diào)q元件的研究
Valve position switch unit 閥位開關(guān)裝置
Tsu : time switching unit 時隙交換單元
Circuit switching unit 電路交換單元
In communications , a circuit , or channel , interconnecting two exchanges or switching units , capable of being switched at both ends provided with the necessary signalling and terminating equipment 在通信技術(shù)中,兩個交換局或交換機之間的連接電路或信道,它能夠在兩端之間進行轉(zhuǎn)接,并提供必要的信令和終端設備。