The fireproof materials filled in the steel fireproof door leaf are environment-friendly and pollution-free. The surface treatment process of the door leaf is powder spraying or PVC coating, which are mature environment-friendly processes. According to the different fire resistance of steel fire doors, their fire resistance can be divided into three grades: A, B, and c. Steel fire doors of different grades can be used in various places.

የ ZHTdoors የእሳት በሮች, በእሳት በሮች እና በዊንዶውስ ውስጥ የ 31 ዓመታት የምርት ልምድ. ዋናው የ UL የእሳት በሮች ፣ EN የእሳት በሮች ፣ BS EN የእሳት በሮች ፣ ወዘተ., የምስክር ወረቀት አለን ZHTdoors ድጋፍ የኦሪጂናል ዕቃ አምራች እና ነፃ ንድፍ.የእኛ ጥቅሞች: ጥሩ ጥራት, የፋብሪካ ዋጋ, ጥሩ አገልግሎት.እኛን ለማነጋገር እንኳን ደህና መጡ.