Xov xwm kev lag luam
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Daim ntawv thov ntawm Peristaltic twj tso kua mis hauv kev kho dej khib nyiab
Nyob rau hauv xyoo tas los no, nrog kev nce qib ntawm kev lag luam thiab kev lag luam hauv nroog tsis tu ncua, kev lag luam kev lag luam tau txhim kho sai, tab sis cov teeb meem ua paug tom ntej tau dhau los ua qhov teeb meem tseem ceeb uas yuav tsum tau daws sai sai.Kev kho dej phwj tau maj mam dhau los ua qhov tseem ceeb rau kev lag luam d ...Nyeem ntxiv
