flow-rate measurement

例句：

1. 1.The engineer used a special device to measure the flow rate of the oil.
   工程师使用一种特殊的装置来测量油的流量。
2. 2. In order to improve efficiency, we need to measure the flow rate of our production process.
   为了提高效率，我们需要测量我们的生产过程的流速。
3. 3.The doctor advised us to measure the flow rate of our blood pressure regularly.
   医生建议我们定期测量血压的流速。