a. Good sealing performance. b. Long service life: 25-30 ... tAncillary equipment: In-taking system, cleaning system, level-indicating system, temperature-measuring system, ventilation system, drying system, fumigation system, and discharging system.Features:a. Good sealing performance.b ... into bending machine, being bended and seamed, to form a 30-40mm wide continuous spiral convex bar around the silo ...