Features: 
 1, die cast aluminum alloy shell, the surface high-pressure electrostatic spray; 
 2, the shell structure of increasing safety, flameproof switch with the internal components; 
 3, the use of curved road sealing structure, with strong water and dust; 
 4, pipe or cable wiring; 
 5, for 1 and Zone 2 dangerous places; 
 6, for Class IIA IIB, temperature class T1 ~ T6 of the explosive atmosphere.