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。
In a letter to its customers, Heraeus Medical said it had experienced a critical machine failure at its main site when it was in the process of upgrading its production processes.，这一点在im钱包官方下载中也有详细论述
。雷电模拟器官方版本下载对此有专业解读
Медведев вышел в финал турнира в Дубае17:59
* @param left 左边界。51吃瓜对此有专业解读