UL列明的任何电缆经过测试验证若符合某种防火等级，可在电缆印上UL识别字、防火等级和批准编号。
UL listed to verify any cable tested if they meet certain fire rating may be printed on the UL in the cable identifier, fire rating and approval number.
UL列明的任何电缆经过测试验证若符合某种防火等级，可在电缆印上UL识别字、防火等级和批准编号。
UL listed to verify any cable tested if they meet certain fire rating may be printed on the UL in the cable identifier, fire rating and approval number.
应用推荐