Cov pob zeb ua si ua lub luag haujlwm tseem ceeb hauv kev tsim kho kev lag luam, ua haujlwm tseem ceeb hauv kev tsim vaj tsev, phab ntsa, thiab pavements. Raws li qhov kev thov rau cov pob zeb ua vaj tse nce, yog li qhov xav tau rau cov tshuab ua haujlwm tau zoo thiab ntau yam. Th
Cov pob zeb ua pob zeb yog cov khoom siv tseem ceeb hauv kev tsim kho kev lag luam thiab kev tsim cov blocks no yuav tsum tau siv cov tshuab tshwj xeeb xws li cov cement thaiv ua tshuab thiab thaiv cov tshuab xovxwm. Cov tshuab no ua lub luag haujlwm tseem ceeb hauv
Cov cement thaiv me me ua tshuab tau dhau los ua cov cuab yeej tseem ceeb hauv kev tsim kho kev lag luam, ua kom cov txheej txheem ntawm kev tsim cov pob zeb rau ntau yam kev siv. Los ntawm lub tsev buildi