《机工数学》(上、下册,德懿编,科学技术出版社出版)是一本注意结合生产实际,内容精炼,较好地根据机械工人业余学习的特点和条件编写的业余教材。机械工人在业余学习中都迫切要求尽快地解决他们在生产中常用的计算、画图等问题。可是过去恰恰比较缺乏适合他们使用的教材。有不少机械工人学习了两三年甚至 The mechanic math (published in the next volume, De Yi, Science and Technology Press) is a combination of production and pay attention to the refining of content, according to amateur learning mechanic characteristics and conditions of preparation of amateur teaching materials. In their spare time learning, mechanic workers are urgently required to solve the problems of calculation and drawing as commonly used in their production. However, in the past, there was a lack of teaching materials suitable for their use. There are many mechanical workers who have studied for two or three years