Indlela yokulinganisa i-lifti hall door sill engenhla
Hlukanisa ubude obuphelele obulinganisiwe ngo-2 bese uzungeza uye ku-whole eseduze ukuze uthole inani lokuvula umnyango (isibonelo: 1690÷2=845mm, okungukuvula umnyango okungu-800)