UL1012
6.18 POWER UNIT, FIXED – A power unit that is intended to be permanently connected electrically.6.21 POWER UNIT, STATIONARY – A cord and plug connected power unit that is intended to be
fastened in place or located in a dedicated space.
以上2个电源有什么区别？fixed和stationary不都是固定的吗
没有做过UL153，仅凭猜测：
定义一：强调的是永久的和电源连接，也就是说用的是固定布线。
定义二：用的是power cord and plug
所以这两个的区别在于电源的连接方式。
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