Ngaphezu kwemisebenzi yeminyango evamile, iminyango yomlilo ye-UL ingavimbela nokusabalala komlilo nentuthu. Bangakwazi ukuvimbela ukusabalala komlilo phakathi nenkathi ethile yesikhathi futhi baqinisekise ukukhishwa kwabantu. Umnyango womlilo we-UL uyigumbi lomlilo elinokumelana okuthile nomlilo, elibekwe endaweni yomlilo, izitebhisi zokuphuma, i-vertical shaft, njll.

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.