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Open the course of "Gem Processing Technology", It is found that it is based on "Gem Processing Technology" written by Professor Liu Ziqiang of Jewelry Department of Jinling Institute of Science and Technology. Including six aspects of knowledge-a preliminary understanding of some gemstone raw materials, Understand the names, characteristics and development history of different gemstone cut styles, understand some basic equipment and accessories for gemstone processing, understand the processing principles and technological methods of gemstones, see the processing process of standard round polyhedral styles, and learn the processing quality evaluation of gemstones (including jadeite).只是想起一件好笑的事情来，有些忍俊不禁。吴凌珑冲儿子道，你听好了。我让你嫂子把庆功宴准备好，等你大胜而归。The above operation actually adds two mirror axes in the horizontal and vertical directions to the graph.