Umnyango we-fire rate louvers usebenzisa amaphrofayili ensimbi, ukukhetha okuqinile kwezinto zokwakha, kanye nekhwalithi eqinisekisiwe. I-Fire rate louvers door inezincazelo ezihlukahlukene kanye nobuciko obuhlakaniphile. Singabakhiqizi abaneminyaka eminingi yesipiliyoni sokukhiqiza kanye nesevisi esondelene kakhulu.

Iminyango yomlilo ye-ZHTdoors, iminyaka engu-31 yesipiliyoni sokukhiqiza eminyango yomlilo kanye neWindows. Iminyango yomlilo eyinhloko ye-UL, iminyango yomlilo ye-EN, iminyango yomlilo ye-BS EN, njll., Sine-certification.ZHTdoors isekela i-OEM kanye ne-design yamahhala.Izinzuzo zethu: ikhwalithi enhle, intengo yefekthri, isevisi enhle.Siyakwamukela ukuthi uxhumane nathi.