oil hand pump

例句：

1. 1. The oil hand pumpis used to extract oil from the ground.
   油手泵用于从地下提取石油。
2. 2. Theoil hand pump is essential for maintaining theoil flow in the pipeline.
   油手泵对于保持管道中的油流至关重要。
3. 3. The oilhand pump was designed to be easy touse and maintain.
   油手泵设计得易于使用和维护。