二氧化钛-氧化铝复合载体
TiO2-Al2O3 composite support
氧化钛-氧化钇粉体
titanium dioxide-yttrium oxide powder
臭氧化—氧化分解反应
ozonidation-oxidation decomposition reaction
二硼化钛-氧化铝
titanium diboride-alumina
焊条药皮碱度
coating basicity of electrode
药皮焊条
double layers welding rod
covered electrode
coated electrode
welding rods
flux-coated electrode
药皮焊条电弧焊
covered-electrode welding