区段，所述区段位于所述扫描位置的下游侧，并具有低点，所述低点低于所述透明平台的上表面；

The region segmentation is arranged on the down stream side of the scanning position, and the region segmentation has a low which is lower than the upper surface of the transparent platform;

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区段，所述区段位于所述扫描位置的下游侧，并具有低点，所述低点低于所述透明平台的上表面；

The region segmentation is arranged on the down stream side of the scanning position, and the region segmentation has a low which is lower than the upper surface of the transparent platform;

youdao