Yuav ua li cas xaiv cov tuab ntawm chav dej da dej iav?
Ua tib zoo saib cov iav tuab thaum nriav chav da dej. Cov duab tuab tshaj plaws yog 6mm, 8mm, thiab 10mm. Feem ntau, chav da dej tso ncaj kab xaiv tuaj yeem xaiv 8 hli lossis 10 hli tshwj xeeb tau teev, thiab cov iav ntab iav muaj peev xwm xaiv tau 8 hli cov lus qhia. Ib nrab-nkhaus iav nto feem ntau xaiv 6 hli loj rau rooj txav tau iav, uas muaj qhov zoo ruaj khov. Lub iav hnyav dua, ntau dua tus nqi, thiab cov nqi yuav tsum ntau dua rau cov hauv paus.
