1.最近一年销售收入小于5000万元（含）的企业，比例不低于5%。
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."。heLLoword翻译官方下载对此有专业解读
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