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But e-bikes containing lithium-ion batteries are a newer challenge. "When a battery fails, it doesn't necessarily ignite, it will often produce some off-gases," says Stephen Welch, senior lecturer at the University of Edinburgh's Fire Research Centre. "Those off-gases are toxic and flammable. If they accumulate, you can have an explosion risk."
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除夕之夜，哈法亚公司食堂布置一新，中伊两国员工互致问候，一起包饺子、贴春联、演节目，在互动中增进交流。“活动中，我和中国同事相互学习了一些日常用语，文化交流拉近了我们的距离。”伊拉克工程师穆斯塔法·艾哈迈德说。
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