常見(jiàn)例句雙語(yǔ)例句Installation and compensation of steam pipeline, vent and condensate drain-off of steam system, recovery of condensate are discussed.探討了蒸汽琯道的敷設(shè)和補(bǔ)償，蒸汽系統(tǒng)的排氣和疏水，凝結(jié)水的廻收。Water resources of such kind of karst water system drain off through the exits of under-ground rivers and powerful springs beside mountains to the ground.這類(lèi)巖溶水系統(tǒng)的水資源大部分在山邊暗河出口或大泉排泄到地表； 返回 drain-off system