Peb cov nqi sib dhos tuaj yeem tshaj 85%, uas yuav ua rau lub sijhawm siv sijhawm luv.
Q4: Yuav ua li cas txog tus nqi ntawm prefabricated tshwj xeeb-zoo li tus kis las ncaws pob?
Cov qauv steel tshwj xeeb siv cov hlau ntau dua thiab muaj kev ua haujlwm nyuaj dua li cov qauv qub, yog li lawv cov nqi yog me ntsis siab dua li cov qauv hlau zoo tib yam.
Q5: Dab tsi yog qhov kev tiv thaiv hluav taws kub kho rau cov qauv steel ntawm cov chaw ua si tshwj xeeb zoo li?