研究辽东半岛和山东半岛出土的玉牙器(原定“璇玑”、“牙璧”)器型的关键,是要牢牢抓住其形制基因(简称为“形基”),即其原形表面钻孔、边缘加工等处理手法。只有从这一角度进行器物造型的分析、思辨,方可得出科学的解释。首先对“璇玑”和“牙璧”进行形基解析。“璇玑”原仅指平面圆孔三牙器;原“牙璧”包括所有带牙的或边缘做出各种缺口者,其形基既有圜形,也有非圜形,有的与璧相合,有的与璧相悖,有失笼统,难免会有失实之虞。在此要辨识弧面圆孔边刃 The key to studying the type of jade earthenware (formerly named “Xuanji”, “Tooth Bi”) unearthed in the Liaodong Peninsula and Shandong Peninsula is to firmly grasp its shape gene (referred to as “ ), That is, its prototype surface drilling, edge processing and other practices. Only from this point of view of the shape of the utensils, speculation, can come to a scientific explanation. First of all, ”Xuanji“ and ”Tooth Bi“ for shape analysis. ”Xuanji “ refers to the original flat taphole three teeth; the original ”Tooth Bi" includes all the teeth or the edge to make a variety of gap, its base has both 圜 shape, there are non-圜 shape, there And the Bi match, and some contrary to the bi, there is unconventional, it is inevitable there will be the danger of misrepresentation. Here to recognize arc round edge