近日，北京标准北京市昌平区市场监管局开展电动自行车及配件产品质量安全检查，昌平车新并就11月1日实施的开展三项电动自行车相关标准对经营主体进行宣贯指导，引导经营主体合规经营。电动
中国消费者报记者董芳忠摄影报道
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