The book "Surface hardening of parts of oil equipment and tools" by E. L. Marhasina is an important work that will be useful to both specialists in the oil industry and students of technical universities. In this edition, the author is deeply immersed in the topic of hardening surfaces, which is a key aspect in ensuring the durability and reliability of equipment used in conditions of increased loads and aggressive environments. The book discusses various methods and technologies of surface hardening, including heat treatment, coating and other modern approaches. E. L. Marhasin shares his knowledge and experience, which makes the material understandable even for those who are just starting out in this challenging field. Readers will be able to learn about the advantages and disadvantages of each method, as well as how to choose the right solution for specific operating conditions. This book will be of particular interest to engineers working in the oil and gas industries, as well as specialists in the repair and maintenance of equipment. Students and graduate students of technical specialties will find in it not only theoretical knowledge, but also practical recommendations that will help in their future professional activities. It is important to note that the book can also be useful for researchers engaged in the development of new technologies for strengthening .. The topics raised in the book cover a wide range of issues related to improving the reliability and efficiency of oil equipment. The author emphasizes the importance of choosing the right materials and technologies, which in turn contributes to reducing maintenance and repair costs. In today's market, where competition is growing every day, such knowledge becomes especially relevant. Style E. L. Marhasina is distinguished by the clarity and logic of the statement. He is able to explain complex concepts, which makes his books attractive to a wide audience. In addition to "Surface hardening of oil equipment and tool parts", the author is also known for his other works on various aspects of engineering and materials science. These works, like this book, are distinguished by a high level of scientific validity and practical orientation. If you are looking for literature that will help you better understand the processes taking place in the oil industry, and master modern hardening technologies, then this publication will become an indispensable assistant. The book "Surface hardening of oil equipment and tools" is not just a textbook, but a real encyclopedia of knowledge that will help you become an expert in your field. Therefore, ,:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ if you are interested in such search queries, as "methods of hardening parts" , "Technologies for Oil Equipment" , "Engineering Materials" , Do you want to know more about ,? how to improve the reliability and durability of equipment, Then this edition should definitely take a place on your shelf. Do not miss the opportunity to deepen your knowledge and expand your horizons in the field of petroleum engineering with the help of the book E. L. Marhasina .