Ƙofar wuta ta UL tana nufin daidaitaccen ƙofar wuta ta Amurka, wadda ake amfani da ita a Arewacin Amirka da wasu ƙasashe da yankuna waɗanda suka fahimci matakan UL. Daban-daban da sauran kofofin wuta, fasalin fasalin Ƙofofin Wuta na Ƙasar Amirka shi ne cewa Ƙofofin Wuta na Amirka na buƙatar gwadawa ta hanyar guduma ta ruwa. Barka da zuwa tuntubar mu.

ZHTdoors kofofin wuta, shekaru 31 na ƙwarewar samarwa a cikin kofofin wuta da Windows. Babban UL wuta kofofin, EN wuta kofofin, BS EN wuta kofofin, da dai sauransu,.Muna da certification.ZHTdoors goyon bayan OEM da free design.Our abũbuwan amfãni: kyau quality, factory farashin, mai kyau service.Barka da tuntubar mu.