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- 二自由度PID two-degree-of-freedom PID
- 二自由度PID控制 2-DOF PID control
- 基于模糊逻辑的二自由度PID调节器参数整定 Tuning Parameter for Two-Degree-of-Freedom PID Regulator Based on Fuzzy Logic
- 二 two
- 模糊二自由度PID two-degree-of-freedom fuzzy PID
- 二自由度PID控制器 two - degree - of - freedom PID controller
- 一种新的二自由度PID调节器设计方法 A New Design Way of Two -degree -freedom PID Regulator
- 两自由度PID two liberty degree PID controller
- 二号 2nd day of the month
- 二楼 second floor
- 周二 Tuesday
- 自由度 freedom of motion
- 二次 adratic quadrate
- 二等 second-class
- 大二学生 sophister
- 小二 young waiter in a wineshop or an inn
- 乙二醇 glycol
- 二等奖学金 minor award
- 二元 duality
- 二度 bis
