[计] servo system control, servo type operational element, servo-type operational element
sì fú shì yùn suàn bù jiàn ㄙˋ ㄈㄨˊ ㄕˋ ㄩㄣˋ ㄙㄨㄢˋ ㄅㄨˋ ㄐㄧㄢˋ
伺服式运算部件