在口腔科的技工打磨修模过程中,蜡勺是常用工具。传统的蜡勺需用火焰加温,使用效率不高,且污染空气。我们在上海产YD系列307—4型台式牙钻车上加装了一只双万双掷开关,在牙钻车停机时,利用它的可控硅无级调速装置来控制蜡勺温度,进行蜡模雕塑。蜡勺用毕,将双刀双掷 Stomatology workers in the process of grinding and dressing, wax spoon is a commonly used tool. The traditional wax spoon need to use flame heating, the use of efficiency is not high, and pollutes the air. We have installed a double-double-double-throw switch on the YD series 307-4 bench-top dental drill in Shanghai to control the temperature of the ladle with its silicon controlled variable speed device when the dental drill is down, Wax sculpture. Completed wax spoon, the pole double throw