A certain enterprise's vacuum drum filter machine
        
Oil sludge drying system of a central enterprise
        
A certain enterprise's caustic soda machine
        
Industrial activated sludge drying system of a certain enterprise
        
A multifunctional sulfur production tank for a certain enterprise
        
The first set of gasification slag drying system in China for a certain enterprise
        
A hazardous waste sludge drying system for a certain enterprise
        
Oil sludge drying system of a petrochemical state-owned enterprise
        
MVR evaporation unit for leachate of a certain enterprise
        
Municipal sludge drying project of a certain state-owned enterprise
        
PTC/CTA drying project of a certain enterprise
        
A company's soda ash calcination furnace project