... single or double. Control the rotating speed by buncher, DE machine and frequency variable motor. Be reliable, energy-saving, and ... air cylinder edge sealing, spring edge sealing, and graphite block sealing and combination for above. 6. Kiln head hood: ... 2) It is also used in various industries, such as cement, nonferrous metallurgy, ferrous metallurgy, chemistry, building, refractory material, ...