The equipment ensures automatic closing at current zero, preset test voltage automatically and the effect is fine.

设备自动保证过电流零点合闸，自动预置试验电压，试验效果好。

youdao

The equipment ensures automatic closing at current zero, preset test voltage automatically and the effect is fine.

设备自动保证过电流零点合闸，自动预置试验电压，试验效果好。

youdao