Class A fireproof doors are especially suitable for those occasions that require fine grinding before electroplating, excellent vibration, mirror polishing of hand tools, mirror polishing of electric heating tubes, etc. Although in terms of purchase cost, Class A fireproof doors are higher than Class B fireproof doors, but in terms of comprehensive use cost, Class A fireproof doors are better than Class B fireproof doors in many aspects.

ZHTdoors portas corta-fogo, 31 anos de experiência em produção de portas corta-fogo e janelas. As principais portas corta-fogo UL, portas corta-fogo EN, portas corta-fogo BS EN, etc., temos certificação. ZHTdoors suporta OEM e design gratuito. Nossas vantagens: boa qualidade, preço de fábrica, bom serviço. Bem-vindo a nos consultar.