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.
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。
。关于这个话题，爱思助手下载最新版本提供了深入分析
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