Iingcango zomlilo ze-UL zahlukile kwezinye iingcango zomlilo. Uphawu olucacileyo lweengcango zomlilo ezisemgangathweni zaseMelika kukuba iingcango zomlilo ezisemgangathweni zaseMelika kufuneka ziphumelele uvavanyo lwamanzi omlilo. Izincedisi ezintlanu zomnyango womlilo kufuneka nazo zibe neleyibhile ye-UL.

ZHTdoors iingcango zomlilo, iminyaka eyi-31 yamava okuvelisa kwiingcango zomlilo kunye neWindows. Iingcango eziphambili zomlilo ze-UL, iingcango zomlilo ze-EN, iingcango zomlilo ze-BS EN, njl., Sine-certification.ZHTdoors ixhasa i-OEM kunye ne-design.Our yamahhala: umgangatho omhle, ixabiso lefektri, inkonzo enhle.Wamkelekile ukuba uqhagamshelane nathi.