En Yangın merdiveni kapısı Sırları
Fire door is the name given to the door that provides the fastest evacuation of people to the outside in case of fire and similar emergencies. They are produced using maden materials and dirilik withstand flames up to 60, 90 and 120 minutes, depending on the area of use.Yangın niteliksiz bir dikkatsizlik sonucunda, dizgesel bir aksaklık yüz yahu