花岗岩平台
花岗岩平台-
从水里挖出来的沙子也被使用区提供一个两米的盖在花岗岩平台上。
The sand dredged from the waters will also be used to provide a two-meter capping layer over the granite platform .
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由于系统的光照条件及摄影机到花岗岩基准平台表面的距离都是固定的，所以通过实验标定的方法可以预先求得每个像素所代表的位移量。
Because the light of system shines and the distance between the movie camera and granite reference are invariable , the displacement represented by every picture element can be got beforehand by the means of experiment mark method .