... return stairs 回转式楼梯 return wheel 支撑轮 return 归队待命信号 ...
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Energy Return Wheel is made out of carbon fiber and kevlar components that decrease the weight and increae the overall strength.
能源循环车轮由碳纤维-芳纶复合材料制成，从而减轻重量，增强整体强度。
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BriTek recently unveiled its amazing new Energy Return Wheel, which is an airless bike tire that can never go flat.
ENGADGET: Inhabitat's Week in Green: Dyson Spheres, bladeless wind turbines and airless bike tires
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