Another useful (if somewhat unorthodox) way to take in this graph is to follow the horizontalgridlines.
对这个图表另一个有用的(或许有点非常规)分析方法是从纵坐标来看。
2
The resulting gridlines in burner region are nearly parallel to the diagonals of the horizontal cross-section of the furnace, while the ones on upper furnace are parallel to the boundary.