Press the “R” key to align Northto the top of the screen, giving a direct overhead (plan) view.
点击"R"键来使地图的北方对应屏幕的正上方,并使用从建筑物顶的俯视图查看当前位置。
3
FIG. 2 Internal Cylinder Configuration, top. Overheadview of low pressure liquid withdraw, bottom left. Overheadview of liquid and high pressure gas with-draw, bottom right.