| 单词 | UL (Underwriters Laboratories) |
| 释义 | UL (Underwriters Laboratories) An independent, for-profit laboratory that has developed a large number of safety standards against which it offers testing and certification services for potentially hazardous products, including electrical equipment, marine products and life-saving devices, fire suppression and fire containment equipment, and heating, air conditioning, and refrigeration equipment. See Appendix A for contact information. |
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