自从显示器由相同的直流电压供电开始，就不再需要额外的线。

Since the display unit is powered by the same DC voltage that feeds the transmitter, no additional wiring is required.

youdao

自从显示器由相同的直流电压供电开始，就不再需要额外的线。

Since the display unit is powered by the same DC voltage that feeds the transmitter, no additional wiring is required.

youdao