1. The shell skretch-formed by quality A1-alloy board with plastic sprayed surface; 2. With tight structure, graceful shapement, small volume and corrosion-proof; 3. The lamp shade can be opened quickly for simplifing maintenance; 4. Steelpipe and cable wiring; 5. Suitable for GB3836-2000、IEC60079, GB12476.1-2000、IEC61241 standard request.