Indlela yokulinganisa yeholo ye-elevator kwiholo yomnyango ophezulu
Yahlula ubude obulinganisiweyo bubonke ngo-2 kwaye ujikeleze kwelona nani likufutshane ukuze ufumane ixabiso lokuvula umnyango (umzekelo: 1690÷2=845mm, engama-800 yokuvula umnyango)