the voltage displayed on the type plate equals the available mains supply voltage.
问题描述：
the voltage displayed on the type plate equals the available mains supply voltage.
这句话里的type plate
上面那个的意思已经知道了，求这句话的翻译：A possibly installed power supply selector has to be set up.
答
一个可能存在的内置电源供应选择器不能不被建立