Sectional Over Head Doors
Industrial sliding door with molded inner and outer double steel door surface
coating polyester High temperature treatment , the middle filled with polyurethane
insulation , door thickness of 40-50mm, sold , insulation , thermal insulation , dust
– prool, wind – resistant , rail adoption galvanized steel sheet strengthened
external torsion spring balance system life of more than 50,000 times , there are
both internal and external seal – ligh manner , frost , moisture , heat insulation.
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