The first small and medium-sized steel production line is designed with an annual output of 300000 tons, mainly producing electric angle steel 4 # -9 #; This production line can also produce channel steel 5 # -12 #, unequal angle steel 50 * 32 * 4-5, 63 * 40 * 4-6, 75 * 50 * 5-8, 90 * 56 * 6-10, in response to changes in market demand.