The basic question of the study on technological philosophy is the classification and its criterion of technologies.
技术的分类和分类标准的研究是技术哲学研究的基础问题。
This paper introduces video concept, main apply domain, main characteristic, classification and technological difficult point of video watermark at first.
本文首先介绍了视频水印的概念、主要应用领域、主要特征、分类以及视频水印研究的技术难点。
Grinding is the biggest energy consumption process in mine production. Improvement of the grinding classification technological level is of great importance.
磨矿是矿山生产中能耗最高的工序，提高磨矿分级技术水平对于矿山有重要意义。
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