锯齿状的变化过程
Serrated variation process
聚氨酯的应用灌封材料
polyurethane potting material
聚氨酯密封环的研制
Development the Polyurethane Wearing Ring
聚苯胺的掺杂反应
Doping reaction of polyani-line
聚苯胺的红外光谱
IR spectra of polyaniline
距离R的正确解法
correct methods of solving the range R
聚苯并咪唑的研究进展
Recent Progress on Polybenzimidazole Resins