... continuous annealing furnace, trolley-type annealing furnace, and vertical annealing furnace. The annealing furnace can be divided into horizontal continuous annealing furnace, trolley-type annealing furnace, and vertical annealing ... of the trolley-type annealing furnace is equipped with travel mechanism so that ... , rollers, steel pipe, bulb tube, steel wire, steel ball, casting, forged pieces, rollers, ...