The heated gas is piped through a coil surrounded by water.
受热气体通过水中的一根螺旋管输送。
《柯林斯英汉双解大词典》
2
A parallel pipe or coil of water connected by a black plate, passing through a series of or other heat transfer fluids.
黑色板相连的平行管或一盘管的水，通过一系列或其他热传导液通过。
3
All standard coils are mechanically expanded copper pipes plus aluminum fins. The surface cooling section is equipped with a pitched discharge coil to ensure complete discharge of condensed water.