Cov saw hlau ntawm cov chaw tsim suab thaj
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Cov saw hlau ntawm cov chaw tsim khoom qab zib, thiab nrog cov khoom txuas
Hauv kev tsim khoom ntawm kev lag luam qab zib, cov saw hlau tuaj yeem siv rau kev thauj khoom qab zib, kev rho kua txiv, kev tso dej thiab kev ua pa. Tib lub sijhawm, qhov hnav siab thiab cov xwm txheej xeb muaj zog kuj ua rau muaj qhov yuav tsum tau ua kom zoo ntawm cov saw hlau. Tsis tas li ntawd, peb muaj ntau hom khoom siv rau cov saw hlau no.