车地无线通信
radio communication between rolling stock and ground
train-ground wireless communication
车-地无线通信
Radio Communication between train and wayside
车地无线网
Train-to-Ground wireless network
传统疗法无效
Not respond to conventional therapy
磁法无损检测技术
magnetic non-destructive testing
低压就地无功补偿
local low-voltage reactive power compensation