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上期我们主要讲ul的基础介绍，这期我们讲它的认证范围。产品涉及的范围主要有电子电器、机械设备、灯具、建材等，在美国市场上销售的产品大都有UL认证或者ETL认证，同时被消费者所接受。所以一般跟电有关的产品都可以申请UL认证。
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