DC transmission line的用法和樣例：
例句
- The converter units generate harmonics which flow in the AC and DC lines.
換流器單元產(chǎn)生的諧波會(huì )流過(guò)交流和直流線(xiàn)路。 - But high-voltage lines are already approaching the million-volt limit on insulators and the operating limits of semiconductor devices that control DC lines.
不過(guò)，高壓線(xiàn)路的絕緣體已經(jīng)逐漸接近百萬(wàn)伏特的限制，而控制直流線(xiàn)路的半導體裝置，也即將達到運作極限。
