blood flowmeter

例句：

1. 1. The doctorused a blood flow meter to measure the patient's heart rate.
   医生使用一个血液流量计来测量病人的心率。
2. 2.Blood flow meters are essential tools for monitoring patients during surgeries.
   血液流量计是监测患者手术期间的重要工具。
3. 3. The nurse carefully placed the blood flow meter on the patient's wrist.
   护士小心翼翼地将血液流量计放在患者的手腕上。