近年來由於工業生產和教育事業的迅速發展,許算尺的需要量也激烈地增加。很多仪器制造厂和高等工業学校都設法制造各种計算尺;从最簡單的照相紙計算尺到正規的刻綫計尺,制造技術和制品的質量都有很大的改進。不少計算尺的式样和材科已完全达到标准。但是計算尺制 In recent years, due to the rapid development of industrial production and education, the demand for allowances has also risen sharply. Many instrumentation factories and higher industrial schools have tried to make various slide rule; from the simplest photographic paper ruler to the regular ruler, the quality of manufacturing technology and products have greatly improved. Many slide rule styles and materials have completely met the standard. But calculate the scale