The reduced diameter tube section on each tube slopes away from the solids falling down the wall. 每个管道上减少的直径方向管道截面远离沿墙下降的固体。
In this section you can view all the Polyglot Meetings on a single map.Just click on any spot to display the meeting. 只需在此截面上的任何位置点击一下，你就能在本图上看得到所有多语种人士的交流场景。
