Hollow hlau qhov rooj nrog louvre feem ntau yog siv rau hluav taws xob, chav ua haujlwm thiab lwm yam. Hauv qab lub louvre tso cai rau cov cua ntws tawm sab hauv thiab sab nraud. Lub sijhawm tshwj xeeb ntawm cov hluav taws tshwj xeeb cov louvre tuaj yeem tiv thaiv hluav taws sib kis ib zaug thaum hluav taws tawg.
Ntawm no yog lub qhov rooj khoos phis rau cov neeg siv khoom.
Txais tos tiv toj rau peb. Asico qhov rooj yuav muab rau koj UL teev cov txheej txheem hlau tag nrog UL cov npe tawv tawv. Tsis tas li peb muab txoj kev daws teeb meem rau txhua qhov dej num hauv koj lub khw.