In August 2007, an Air Force unit mistakenly flew six nuclear warheads across the US on a B-52—a cardinal sin to an old Cold Warrior like Gates.

2007年8月，空军某部一架载有6个核弹头的B-52轰炸机错误地飞越美国——对于像盖茨一样的冷战老勇士来说，这是一桩蠢事。

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The piston compressor, the oldest in places such as the cold storage, many central air conditioning unit, and small piston compressor in the fridge and air conditioning.

活塞式压缩机资格最老，用的地方很多如冷库、中央空调机组、还有小型活塞式压缩机用在冰箱和空调中。

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Cold air through the cooling system after exchange of hot air into a cooling fan unit discharges.

冷空气通过冷却系统交换后变成热空气被冷却风扇排出机组。

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When the truck is stopped, the driver turns on an air handler that circulates coolant around the ice and blows cold air from the unit into the bunk area of the cab.

CNN: An eco-friendly way to cool big trucks