1.Al-alloy,nice appearence 2.easily and quickly change bulb,firm, brightness Application1)be used in explosive mixture gas such as methane,coal dust etc.2)can be used for fixed part illumination in the mine,lanes or parking,substation;l3)when used under gas mine ,around the parking, in center or pump room and main lanes,which should have fresh air in and out. Conform to Standards1)GB3836.1-20002) ...