The transformer simply plugs into a mains socket.
变压器只是简单插在电源插座中。
In most cases it is derived from the AC mains by means of a transformer and rectifier.
大多数情况下直流电是从交流电通过变压器和整流器而来的。
Future traction drives may operate directly from the mains without this transformer.
未来的牵引传动系统可能直接与电网相连，无需该类变压器。
Future traction drives may operate directly from the mains without this transformer.
未来的牵引传动系统可能直接与电网相连，无需该类变压器。
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