三段式阻抗继电器
impedance relay with three sections
三段式实验教学法
three-stage experiment teaching method
三段式起动
Three-step starting process
three-step start
三段式培养模式
three stages training mode
三段式空气压缩机
three stage air compressor
三段式浸出器
three-stage lixiviate reactor
三段最小平方法估计式
Three-stage least squares (3SLS) estimator
三断口式电分相装置
three-open type neutral section device