direction of flow

• 流体流向

direction of flow的用法和样例：

例句

1. Install the valve in the line with the arrow on valve body pointing in the direction of flow.
   要按照阀体上的箭头方向在管线上安装阀门，使得箭头方向与流体流向相同。
2. Sulphur is a constituent of gunpowder.
   硫是火药的组分。
3. The running situations of main FGDs are introduced.
   介绍了国内各种脱硫装置的运行情况。