注：每一块面板清晰显示三相五线制电源的母线、支线。

Remark: every wire of the three-phase five-wire system is clearly indicated on the front panel.

youdao

注：每一块面板清晰显示三相五线制电源的母线、支线。

Remark: every wire of the three-phase five-wire system is clearly indicated on the front panel.

youdao