Або купіть у застосунку – тут є трекер читання і ще бага-а-ато цікавок ;)
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Опис
Over the past century, the U.S. Army Corps of Engineers has built a vast network of water management infrastructure that includes approximately 700 dams, 14,000 miles of levees, 12,000 miles of river navigation channels and control structures, harbors and ports, and other facilities.