Ib lub qhov rooj ntoo yog lub qhov rooj uas tsis muaj lub Hoobkas txiav lossis kho vajtse npaj. Hloov chaw, nws muaj ib qho slab ntawm ntoo lossis steel nrog square, cov npoo hnav. Cov qhov rooj slab no, lossis Blabs, muab qhov yooj yim tshaj plaws rau cov neeg yuav khoom ntawm yuav ua li cas thiab qhov rooj tuaj yeem ntsia tau.
Peb yog Dalian lub tsev kub, peb muab ntau qhov rooj hlau, thau ntoo thiab lub qhov rooj ntoo rau kev lag luam thiab thaj chaw ua haujlwm soj ntsuam thiab kev sab laj.
