The framework of ce greenhouse is usually built with rust - proof iron bars and sealed with materials such as polyethylene film or polycarbonate sheet . a ce greenhouse is usually equipped with automatic environmental control system and irrigation system 環(huán)控溫室通常以防銹鐵料作樁柱及支架、再用透明膠膜或膠板等物料密封,并裝設(shè)自動化的環(huán)控系統(tǒng)及灌溉系統(tǒng)。