mercury vacuum pump

例句：

1. 1. The mercury vacuum pump is used to remove air from the spacecraft's interior.
   水银真空泵用于从宇宙飞船内部移除空气。
2. 2.The mercury vacuum pump is essential for maintaining a clean and dry environment in the laboratory.
   水银真空泵对于实验室保持清洁和干燥的环境至关重要。
3. 3. The mercury vacuum pump was replaced with a more efficient model after several years of use.
   经过几年的使用后，水银真空泵被更高效的模型所取代。