Cov ntaub ntawv kev lag luam
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Dab tsi yog qhov zoo ntawm yim-sab sealing hnab
Hauv kev lag luam ntim khoom, muaj ib hom ntim hnab hu ua yim-sab foob hauv kev lag luam.Muaj plaub sab ntawm sab laug thiab sab xis ntawm lub cev thiab hauv qab, yog li kev lag luam feem ntau yog hu ua yim-sab foob, thiab vim tias hauv qab tuaj yeem nthuav tawm nyob rau hauv parallel, lub ...Nyeem ntxiv
