作为 UL产品的一个明显特征 ,所有的 UL产品必须有 UL的列名、认可或分级标志。在我国分级标志很少见 ,绝大我数是列名、认可产品。列名、认可标志包括 L类列名、认可标志和 R类列名、认可标志。L类列名标志是由 UL公司在美国印刷 (以标签形式 )和发放的。它的控制一般比较严格 As a distinct feature of UL products, all UL products must have a UL listing, approval or classification mark. Grading marks in our country is rare, the vast majority of me is the column name, approved products. Column names, accreditation signs include L class listing, accreditation signs and R class names, accreditation marks. The L class listing logo was printed (in the form of a label) and distributed by UL Corporation in the United States. Its control is generally more stringent