礼宾部员工要经常回顾酒店的房间种类和楼层平面图，使得他们在提供相关服务的时候可以加快速度。
The bellman should always review the Room Category and Floor Plan so that some tasks process concerned could be always speeded up.
之后，把速度平面上各点的速度乘以时间平面图上反射时间的一半，得出深度平面图。
After that, take velocity of each point on the plan, multiply by half reflection time on time plan obtaining depth map.
通过对各层速度平面图的分析，了解该区速度的横向和纵向变化规律。
Find out the lateral and vertical velocity change principle through integrated analysis of the interval velocity data in this area.
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