... in hazardous area ; IntroductionBAL-127(36)G Mining Explosion-proof Audio-light Combined Bell mainly used under coal mine ... alarming. It meets the standard of MT428explosion-proof bell>.Type and EX-Mark TypeRated Voltage(V)Rated ... ExdIStructureIt is composed of explosion-proof shell, junction box, cable inletting device, button, indication lamp, bell, alarming hammer ,electromagnet and others ...