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。
At least 20 people have died and dozens have been injured after a military cargo plane carrying banknotes crashed while landing near Bolivia’s capital on Friday, damaging about a dozen vehicles on a highway and scattering bills on the ground, an official has said.
。关于这个话题，搜狗输入法下载提供了深入分析
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Cuban president says country will ‘defend itself with determination’ after deadly coastal assault by exiles