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- adverb In a
hydromechanicalway; by means of hydromechanics.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Provided that sufficient quantities of water are available, these alluvial deposits are exploited either hydromechanically by monitors, manually or mechanically.
The hydromechanically-extracted pre-concentrates are amalgamated, the fine material processed by a tank leaching and the Merrill-Crowe process and then refined by a smelting separation.