Steel fire door closers, sequencers, hinges and other easily worn accessories are high-quality hardware, and the use times are strictly tested to ensure the service life of the product. The steel fireproof door has a good airtightness, which is closed in place and tightly, and will not leave a crack in the door to cause the indoor air conditioner and heater to overflow.

ZHTdoors 防火扉、防火扉および Windows での 31 年の生産経験。 主な UL 防火扉、EN 防火扉、BS EN 防火扉など。私たちは認定を受けています。ZHTdoors は OEM と無料のデザインをサポートしています。私たちの利点: 良質、工場価格、優れたサービス。