Asked | Open questions | Answered Points Date Pair Term / Answer given Level Status Gloss 4 Jan 14 '14 eng>vie Dike fire control water for later disposal đào rãnh gom nước chữa cháy để xử lý sau pro closed ok 4 Jun 22 '12 eng>vie upward displacement of air (phương pháp) đẩy ngược khí lên pro closed ok - Jun 21 '12 eng>vie downward displacement of water tháo nước ngược xuống pro closed no Asked | Open questions | Answered