shovel swing engine

例句：

1. 1. The shovel swing engine is a common type of engine used in construction sites.
   铲子摆动引擎是一种常见的用于建筑工地的发动机。
2. 2. The shovel swing engine was invented to improve the efficiency of excavation work.
   铲子摆动引擎被发明出来，以提高挖掘工作的效率。
3. 3. The shovel swing engine has a long history and is still widely used today.
   铲子摆动引擎有着悠久的历史，至今仍广泛使用。