回流线 meaning in Chinese
return cable
Examples
- Electric traction ; wires for earthing and return current
电力牵引.接地线和回流线 - The two rails are not only signal lines of track circuits , but also loop current line of locomotive traction current in electrified railway block
在电气化铁路区段，两条钢轨既是移频信号的传输线又是机车牵引电流的回流线。