servo

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ser·vo /ˈsɜːvəʊ $ ˈsɜːrvoʊ/ noun (plural servos) [countable] technical  a part of a machine which passes on or increases a force or movement 伺服系统，伺服动力传动装置 servo-assisted brakes 伺服辅助车装置

ser·vo nounChineseSyllable  

servo
ser·vo /ˈsɜːvəʊ $ ˈsɜːrvoʊ/ noun (plural servos) [countable] technical
a part of a machine which passes on or increases a force or movement:
    servo-assisted brakes

servoBrE /ˈsɜːvəʊ/ 🔊NAmE /ˈsɜːrvoʊ/ 🔊 noun (

plural

servos) (specialist) a part of a machine that controls a larger piece of machinery （机器的）伺服系统，随动系统