假如空气通过裂痕进入灭弧室，真空断路器就失灵。

Vacuum breakers fail supposing that leaks permit air to enter the interrupting chamber.

youdao

假如空气通过裂痕进入灭弧室，真空断路器就失灵。

Vacuum breakers fail supposing that leaks permit air to enter the interrupting chamber.

youdao