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Technical ArticleWhy do all circuit boards have a RU stamp? Is it a company?Time：2019-02-28 09:49:59 Click：
In fact, the so called RU stamp is a kind of UL mark, which is widely used to the general electronics components. Furthermore, it’s mainly popular in Canada and USA;
PS: UL mark can be divided into three different types: Listed, classified and recognition mark.
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