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Use "tractors" in a sentence
"In cases where the speed of the fan cannot be modified (e.g. cooling fans attached to the engine in tractors), it is possible to obtain a variable output of air flow depending on temperature morphing the shape of the blades by Shape Memory Alloy (SMA) materials embedded in the blade itself or discretely placed in the in the shaft of the blade."
"I should also note that one bizarre thing about Sears tractors is they have identical models where one model is on sale and one isn't."
"Associated Press, Athens | Mon, 02 / 02 / 2009 5: 09 PM | World Riot police fired tear gas at farmers from the southern island of Crete Monday to prevent them from driving their tractors from the Greek port of Piraeus to the capital as part of a protest deanding government financial help."