Samples should be cut and processed to obtain a test surface.
试样应切割加工，以便获得检验面。
A system consisting of CCD sensor and computer may be used to test surface braiding Angle of three dimensional composite material preform, and analyse its unevenness.
该系统以CCD为传感器，与微型计算机连接，进行三维编织复合材料预制件表面编织角的检测，并对其进行不匀分析。
Methods The 60 premolars were made into test pieces and embedded with resin. One side was exposed as a test surface, with its enamel removed and superficial dentin polished with sandpaper.
方法将因正畸需要拔除的60颗前磨牙制成试样块并用树脂包埋，一面暴露作为测试面，去除其釉质暴露浅层牙本质并用砂纸磨平。
Methods The 60 premolars were made into test pieces and embedded with resin. One side was exposed as a test surface, with its enamel removed and superficial dentin polished with sandpaper.
方法将因正畸需要拔除的60颗前磨牙制成试样块并用树脂包埋，一面暴露作为测试面，去除其釉质暴露浅层牙本质并用砂纸磨平。
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