link motion valve gear

例句：

1. 1.The link motion valve gear is crucial for the smooth operation of the machine.
   连杆运动阀齿轮对于机器的平稳运行至关重要。
2. 2.The engineer carefully inspected the link motion valve gear before installing it.
   工程师在安装前仔细检查了连杆运动阀齿轮。
3. 3.The link motion valve gear was designed to improve the efficiency of the machinery.
   连杆运动阀齿轮被设计用来提高机械的效率。