Qhob thaiv kev ua haujlwm sib luag hauv kev tsim kho lub luag haujlwm, ua haujlwm raws li cov qauv hauv tsev, phab ntsa, thiab cov pavement. Raws li qhov kev thov rau cov pob zeb ua pob zeb nce siab, yog li qhov kev xav tau kom txuag tau thiab ntau yam thaiv ua tshuab. Th
Taw qhia rau qe pw tshuab ● Lub cav ntov qe, tseem hu ua cov qe qe ua tshuab, yog hom pob zeb ua rau saum npoo av thiab txav mus rau tom ntej. Nws yog wi
Yuav ua li cas ua cov pob zeb ua tawg? Nws yog ib qho tseem ceeb kom nco ntsoov tias nws tsis zoo ib yam rau kev tsim cov vaj tse uas nws yuav tsum tau siv rau phab ntsa sab hauv thiab sab hauv partitions, rau