... purified air with high cleanliness for partial area. It consists of frame, FFU, pre filter, damping layer, lamp and others. Clean ... cleanliness class can be from 100 to 100000. Structure of clean booth: the frame of clean booth is made from industrial aluminum profile, ... , it is with low cost, short construction period. Material of clean booth:Frame: stainless steel, firm, nice, anti-rust, dust-free ...