This is the 14331st most frequent Russian word.
откачивают
"Откачивают" means "they pump out" or "they extract (by pumping)."
Here, "откачивают" refers to the routine removal of water from a source.
Из колодцев в деревне регулярно откачивают воду для анализа.
They regularly pump water out of the wells in the village for analysis.
In this sentence, "откачивают" indicates the pumping of a liquid (milk) for a practical purpose.
На молочной ферме откачивают молоко для хранения в больших резервуарах.
At the dairy farm, they pump milk for storage in large tanks.
The word "откачивают" is used in a technical context to denote the action of pumping out a substance.