... components, the Department may need to adjust themselves with elastic. 2 major technical indicators 2.1 Protection Time (benzene): ≥ 20 ... supply air device charger port, plug the other end connected with the battery and turn the power switch. Unplug the cord ... operations, chemical and biological warfare, the fire escape. 4.8 with full protective clothing and headgear, caps, gloves, safety shoes and ...