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

注: 每一块面板清晰显示 三相 五线制电源的母线、支线.

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Spreading applications - phase - five - wire system of power distribution is a further safety measure to guard against electric shock.

推广应用 三相 五线制配电系统,是防止人身触电的进一步安全措施.

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