1, in mechanical design, you will inevitably encounter knowledge about electricity, such as: designing an ordinary general equipment, although the main body of the equipment belongs to mechanical design, but the power of the equipment needs motors, and to achieve more advanced functions, you need control motors such as servo motors or stepping motors; The action of equipment requires electromagnetic relays, contactors, circuit breakers and so on. These electrical problems are inevitable. Therefore, it is suggested to study the first, middle and second volumes of electrotechnics compiled by the electrotechnics teaching and research section of Harbin Institute of Technology. This book is easy to understand, does not involve advanced theory, and is practical.

2. In our daily life, we should consciously ponder all the objects around us, such as the kitchen knife commonly used at home, and consider what steel it is made of, what heat treatment process it has undergone, and what manufacturing method it has adopted, instead of just staying at the shallow thinking stage of "the kitchen knife is a knife for cutting vegetables".

3. Mechanical design needs a strong hands-on ability, not an armchair strategist. This requires more hands-on, more contact, more reading, more thinking and more doing.