... mine explosion-proof video camera is a mine ex-proof type electrical equipment, designed according to GB3836.1-2000 "Electrical apparatus for ... requirements" and GB3836.2-2000 "Electrical apparatus for explosive gas atmospheres Part 2: Ex-proof type" d "" , there can be ... iris lens, fixed aperture lens. This integration of mine explosion-proof video camera is small, light weight,low illumination,high- ...