three glass test 三杯试验
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A hydrodynamic suspension test system based on a three-coordinates NC milling machine was developed and the polishing experiment was performed on the optical glass (K9).
研制了基于三坐标数控铣床的液流悬浮研抛试验系统，并对光学玻璃(K9)进行了液流悬浮研抛试验。
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