rod pump

例句：

1. 1.The rod pump is used to remove water from the well.
   泵杆用于从井中抽取水。
2. 2.The rod pump is a simple yet effective tool for cleaning oily surfaces.
   泵杆是一种简单有效的清洁油渍表面的工具。
3. 3. The rod pump was designed to be easily transported and operated by hand.
   泵杆设计为易于携带和手动操作。