... , military industry etc. enterprise2,Can be used in Zone 1 and Zone 2 explosive atmosphere3,Can be used in explosive ... after shot-blasting cleaning, with strong corrosion-proof capacity2,with aesthetic appearance, high mechanical strength, safe and reliable3,The steel pipe or ... cable wiringmain standardsGB3836.1-2000. GB3836.2-2000. GB3836.3-2000.which is equivalent ...