Terms for subject Mathematics containing loop

English	Chinese
computer close-loop control	计算机闭环控制
computer open-loop control	计算机开环控制
exchanger loops	交换环
feedback control loop	反馈控制环
information feedback control loop	资料反馈控制环
loop computation	循环运算
loop network	环状网络
loop plan	循环计划
open-loop control system	开环控制系统
program loop	程序周期
rectangular-hysteresis loop	矩形磁带回线