Cov yam ntxwv

·Vaj huam sib luag yog cov khoom siv ABS rau kev tsim kho, lub zog siab, tsis txhob hloov xim, cov khoom pob tshab yog PC;

·Lub hau qhib thiab kaw hom thawb

Lub ntsej muag ntawm lub thawv faib khoom siv hom qhib thiab kaw, lub ntsej muag npog tuaj yeem qhib los ntawm kev nias maj mam, lub pob khawm qhov chaw xauv tus kheej tau muab thaum qhib;

·Kev tsim cov xov hlau ntawm lub thawv faib hluav taws xob

Lub phaj txhawb nqa kev taw qhia tuaj yeem nqa mus rau qhov chaw siab tshaj plaws, nws tsis txwv los ntawm qhov chaw nqaim thaum txhim kho cov hlau. Txhawm rau kom yooj yim teeb tsa, qhov hloov ntawm lub thawv faib khoom tau teeb tsa nrog cov hlau zawj thiab cov yeeb nkab hlau tawm-qhov, uas yooj yim siv rau ntau yam hlau zawj thiab cov yeeb nkab hlau.