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.
在燃烧器区域的网格线接近炉膛水平截面对角线方向，而在炉膛上部则平行于边界。
2
An infrared ray burner includes an upper combustion layer ceramic plate, a lower combustion layer metallic plate, a shell, a ferrule and a wire netting.