QJZ2-200,315,400/1140(660) Mining Explosion Poorf Vacuum Electromagnetic ... mine explosion proof or flame proof starter QJZ2-200,315,400 The power supply is designed to convert ... mine explosion proof or flame proof starter QJZ2-200,315,400 Verified Information This information is Verified by Bureau ... Mark Center MAD070865 Flameproof vacuum feeder switch, KBZ2-400/1140 2010/03/25 --- 2013/03/18 Testing ...