在示例中给出L型截面的名称，在图和表中给出尺寸和截面特性。包括腹板高度和翼缘宽度公差、腹板厚度公差、翼缘厚度公差、最大允许拱度公差、失方公差、平面度公差和长度公差。

Gives the designation of L sections in an example and the dimensions and sectional properties in a figure and a table. Includes tolerances on height of web and width of flange, on web thickness, on flange thickness as well as the maximum permissible camber, the out-of-square, the tolerances on flatness and on length.