核心的瓶颈首先在于精度问题。目前技术虽然在不断进步，但在打印精细结构或大尺寸零件时，依然难以达到高精度装配所需的公差要求及优秀的表面质量要求，这直接导致了打印件难以直接作为最终功能部件使用。
"There is a considerable risk that more young people will slip into long-term worklessness, unless government acts to address the causes of this rise."
。业内人士推荐爱思助手下载最新版本作为进阶阅读
Green: Jobs that involve traveling
Additional reporting by Hosu Lee and Leehyun Choi in Seoul