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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。
。WPS下载最新地址是该领域的重要参考
The expert advice will now be consulted on for the next three months, before the screening committee gives its final recommendations to governments in the four nations of the UK in March.
"We've brought inward tourism - people staying and spending time in Manchester restaurants, bars, transportation, a lot of jobs," Dunstan told the BBC.
