DC transmission line

• 直流线路

DC transmission line的用法和样例：

例句

1. The converter units generate harmonics which flow in the AC and DC lines.
   换流器单元产生的谐波会流过交流和直流线路。
2. But high-voltage lines are already approaching the million-volt limit on insulators and the operating limits of semiconductor devices that control DC lines.
   不过，高压线路的绝缘体已经逐渐接近百万伏特的限制，而控制直流线路的半导体装置，也即将达到运作极限。