I have several books (tutorials) on mechanical and engineering drawing, but unfortunately I don't have them with me now. Through the study of books (tutorials) on cartography such as machinery, engineering (including electrician), you can learn general knowledge in this field-you can read and draw pictures. For chemical drawing, you need more professional knowledge, involving chemical technology. Therefore, after you master the general drawing method, you should learn to learn chemical drawing well, and you should also learn some knowledge about chemical technology. For professional books in this field, you can choose books with less content and fine content to study first. After laying a good foundation, it is easy to learn chemical engineering drawing.