... 304, the surface is polished, inner surface is smooth, the welding spot has no burrs4, The timer is attached to remind users to replace ... other auxiliary functions, power cut alarm reminds the user to open the life; window of the cage 6, There is a liquid crystal ... of 1Cr18Ni9; 12,The cage use static pressure to let the clean air to go smoothly downwards to get the living area, the inlet and outlet ...