1. Diecasted A1-alloy shell with plastic-sprayed surface; 2. Steelpipe and cable wiring; 3. There is no radiating fin on the shell. It has good radiating result; 4. Steelpipe and cable wiring; 5. Suitable for GB3836-2000 IEC60079GB12476.1-2000 IEC61241 standard request. Luminous source sorts