The scale mark and measure figure on the ruler should be printed completely, neat writing, legible line and even thickness.
标尺的分度容量线及计量数字印刷应完整，字迹清楚，线条清晰，粗细均匀。
Methods: The thickness of enamel and dentin at different positions of 23 upper first and 18 lower first molars were measured by electronic ruler.
方法：用电子测量尺测量23颗上颌第一磨牙和18颗下颌第一磨牙牙合面不同部位牙釉质、牙本质的厚度。
Exposure energy will change with different CCL and the thickness of ink, so we must carry on experiment to confirm under-cut degree, exposure ruler limits 7-9 grade remnant film.
曝光能量会因基板及油墨厚度的不同而变更，请进行试验以确认侧蚀程度后再认定，曝光尺控制在7 - 9级残膜。
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