With these spectral methods, the chemical composition and the structure of the polishingpaste for plastics were identified.
通过上述光谱法确定了该塑料抛光膏的化学组成和结构。
2
After ultrasonic scaling, the teeth should be polished using to improve the clearness surfaces, polishingpaste is the best tool on root surfaces.
经过超声波洁治及刮治后应该对牙齿表面进行抛光可提高其光洁度，牙根面以抛光膏的抛光效果最好。
3
Silica gel column chromatography and solvent extraction were used to separate grease and abradant in a kind of excellent polishingpaste for plastics, respectively.