装新阀于

例句：

1. 1. The engineer was instructed to install the new valves in the factory.
   工程师被指示在工厂安装新的阀门。
2. 2. Before starting the project, we need to install the new valves according to the manufacturer's instructions.
   在开始这个项目之前，我们需要按照制造商的指示安装新的阀门。
3. 3. The technician carefully installed the new valves and tested them for proper functioning.
   技术员仔细地安装了新的阀门，并测试了它们是否正常工作。