管道

• Some lines are laid on the surface, especially in deserted country .
  有的管道线铺设在地面上，特别是在人烟稀少的地区。
• All buried lines are coated with a protective covering to save them from corrosion .
  所有埋设的管道必须涂上保护层，以防生锈腐蚀。
• It also includes the results from several studies on artificially roughened pipelines .
  这里还包括一些在人工加糙管道内做的试验结果。
• Because of these accidents all tanks containing solvents and all pipes were earthed .
  由于这些事故，装有溶剂的所有贮槽和管道都要接地。
• Mixed acid should be allowed to flow for 1 minute in order to flush the pipes and cooling system .
  应让混酸流一分钟，以便冲洗管道和冷却系统。
• Tong uses the model to analyse the effect of a rectangular obstruction in a channel .
  董使用“混合”模型研究了管道中有矩形障碍物时所产生的影响。
• Friction losses in the equivalent lengths of ducts constitute the pressure loss in the elbow .
  管道的等量长度中的摩擦损失即构成弯管中的压力损失。
• The non-bleed controller uses air only when exhausting the line to the controlled device .
  无放流式调节器只有在通至调节机构的管道排气时才消耗空气。
• The non-bleed controller uses air only when exhausting the line to the controlled device .
  无放流式调节器只是在通至调节机构的管道排气时，才消耗空气。
• Air distribution piping systems almost invariably use soft copper tubing with soldered fittings .
  压缩空气的分配管道系统无例外地都是用焊接管件的铜管。