buzzer frequency meter

例句：

1. 1. The engineer used the buzzer frequency meter to check the accuracy of the circuits.
   工程师使用蜂鸣器频率计来检查电路的准确性。
2. 2.The technician adjusted the buzzer frequency meter to ensure proper operation.
   技术人员调整了蜂鸣器频率计，以确保正确运行。
3. 3.The doctor used the buzzer frequency meter to monitor the patient's heart rate during surgery.
   医生使用蜂鸣器频率计在手术期间监测患者的心率。