conduct lock ring

例句：

1. 1. The engineer conducted a thorough inspection of the machine before it was put into operation.
   工程师在机器投入运行前进行了彻底的检查。
2. 2. The security guard conducted a routine check on the perimeter fence.
   保安对围栏进行了例行检查。
3. 3. During the test, the technician conducted the experiment under controlled conditions.
   在测试期间，技术人员在受控条件下进行实验。