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1·Optical scanners ensure that imperfections in the cloth are located and removed.

光电扫描器能确保找出并去除布料上的瑕疵。《柯林斯英汉双解大词典》

2·There are three types of scanning devices: optical scanners, bar code readers, and char and mark recognition devices.

扫描设备有三种类型：光学扫描器，条码阅读器，和char和标记识别设备。

3·The standard methods for extracting range data from optical triangulation scanners are liable to the influence of these problems.

确定激光条纹中心传统的方法容易受到这些问题的影响。