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1. And Otis Elevator in Farmington, Conn., has switched from wound steel cables to flat steel belts, allowing the sheave and motor to be downsized.
   奥的斯电梯公司已经放弃缠绕式钢缆，改用扁平式复合钢带，以进一步减少绞缆轮与马达的体积。