UL94标准介绍UL94? ? UL94 HB flammability standard (UL94 HB可燃性标准) o ? Requirements for HB (HB的要求条件) ? ? UL94 V-0 V-1 V-2 flammability standard (UL94 V-0 V-1 V-2可燃性标准)o ? Requirements for V-0 (V-0的要求条件)