pipeless triple valve

例句：

1. 1. The pipeless triple valve is a critical component in the process of gas transportation.
   无阀三通是气体输送过程中的关键部件。
2. 2. The engineer carefully inspected the pipeless triple valve to ensure it was functioning properly.
   工程师仔细检查了无阀三通，确保其正常工作。
3. 3. The manufacturer has been working on developing a more efficient pipeless triple valve for years.
   制造商已经投入多年时间研发更高效的无阀三通。