circuit number

例句：

1. 1. The technician needs to know the correct circuit number to troubleshoot the issue.
   技术人员需要知道正确的电路编号来解决问题。
2. 2. The company uses a unique circuit number for each product to ensure security.
   公司为每种产品使用独特的电路编号以确保安全。
3. 3. The engineer used the circuit number to locate the faulty component in the circuit board.
   工程师使用电路编号在电路板上定位故障组件。