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countable and uncountable, plural pumpages
That which is raised by pumps. examples
The amount of work done by pumps. quotations examples
A comparison of Silurian dolomite aquifer water-level hydrographs and pumpage graphs indicates that in general water-level decline is directly proportional to pumpage and suggests that recharge balances discharge.
1962, Arthur John Zeizel, Ground-water resources of Du Page County, Illinois