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SAVE $70: As of Feb. 27, the Jackery Explorer 300 is on sale for $189 at Amazon. That's a 27% saving on the list price.
Цены на нефть взлетели до максимума за полгода17:55
"For a long time, roboticists have used DC [direct current] motors to make robots move," says Mike Tolley at the University of California San Diego.