Iminyango yomlilo ihlukaniswe yaba Ikilasi A, Ikilasi B kanye Nekilasi C ngokwesilinganiso somlilo. Phakathi kwazo, isikhathi sokumelana nomlilo se-Class A iminyango yomlilo asikho ngaphansi kwemizuzu engama-90. Uma nje iminyango yomlilo ihlangabezana nalesi simo, ingabizwa ngokuthi iminyango yomlilo ye-Class A. Siyakwamukela ukuxhumana nathi.

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.