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太安靜! 美國政府要求電動車發出噪音
Wednesday, November 16, 2016 1:15
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美國國家公路交通安全管理局(NHTSA)發佈新的規則,要求電動汽車在低速行駛時發出警告音,以警告行人。NHTSA表示,電池驅動車輛在低速行駛時噪音很低,對行人構成威脅,所以新規則是必要的。當車輛以較高速度行駛…

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