Zone 2 dangerous places. 
 IIA, IIB, IIC explosive gas environment 
 Glass fiber reinforced shell mining unsaturated polyester resin pressed. 
 Road surface sealed with a curved design, with the overall product 
 Have impact resistant, waterproof, dustproof, corrosion proofing. 
 Containing an assortment of instruments, such as ammeter, voltmeter, tachometer. 
 Pipe or cable wiring. 
 Meet GB3836-2000, IEC60079 standard request.