4Study on synthesis and properties of water-soluble phenol-formaldehyde resin used in emery cloth13-16
5Determination of metal elements in rhizome of polygonatum by atomic absorption spectrometric method17-19
9Effects of different tobacco maturity on main physical and chemical properties and smoking quality of tobacco leaves30-32
10The variation analysis of the main chemical components of flue-cured tobacco leaves in Yunnan province33-37
19Experimental study of operating performance on air source heat pump water heater with cylic heating71-74