由于表面粗糙、精度不足等问题，金属件打印完成后须经历一系列复杂后处理流程，其中成本主要集中在打磨、抛光等表面精加工流程。更值得关注的是，目前大量后处理环节仍依赖人工操作。这不仅意味着高昂的人力成本，还存在重复性劳动导致的人员疲劳、效率波动以及质量一致性难以保证等问题。
刘成的女儿早产，曾住进保温箱十天，出院后又因黄疸、肺部发育不良持续随访。儿童保健时，被检出患有先天性心脏病。没有户口，孩子无法办理医保，也无法购买商业保险，看病只能全额自费。
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Зеленский сделал дерзкое заявление о выборах на УкраинеЗеленский: США и Россия требуют проведения выборов на Украине
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Video footage showed the plane on the ground and badly damaged vehicles. In other videos, people could be seen running away from the tear gas and police officers, some holding shields, forming a line. Some in the crowds are seen throwing rocks.