The book "Volume hydraulic and pneumatic machines" by Yu. A. Andreevets is an indispensable source of knowledge for engineers, students of technical specialties and everyone who is interested in modern technologies in the field of hydraulics and pneumatics. This book is a deep and comprehensive study of the principles of operation, design and use of bulk hydraulic and pneumatic machines, revealing to the reader the subtleties of their functioning and the possibilities of use in various industries. Yu. A. Andreevets, an author with a wealth of practical experience and scientific training, created a work that not only explains complex technical concepts, but also makes them available to a wide range of readers. The book discusses in detail the main types of volumetric hydraulic machines - piston, gear, blade and others, as well as their pneumatic counterparts. The author masterfully shows how these devices convert the energy of liquid or air into mechanical work, focusing on their design features, principles of operation and advantages. What makes "Volume hydraulic and pneumatic machines" especially valuable is not only theoretical analysis, but also practical recommendations for the operation, maintenance and optimization of the machines. The book describes in detail the methods of diagnosis and troubleshooting, which makes it useful not only for students mastering the basics of hydraulics and pneumatics, but also for practical engineers involved in the design and repair of equipment. The author pays special attention to modern trends in the development of technologies of volumetric hydraulic and pneumatic machines, their role in the automation of production processes and environmental safety .. This book will especially appeal to those who are looking for a reliable source of information about the technical aspects of hydraulic and pneumatic systems, as well as those who want to deepen their knowledge in the field of mechanical engineering, automation and energy. It is suitable for students of technical universities, design engineers, specialists in the maintenance of industrial equipment and anyone who seeks to understand how voluminous hydraulic and pneumatic machines work and why they remain one of the most effective solutions for the transmission and conversion of energy. Style Y. A. Andreevets is a combination of scientific rigor with clarity of presentation, which makes the book not only useful, but also pleasant to read. The author uses clear explanations illustrated by diagrams and graphs, which helps to better assimilate the material and see real examples of application. His other well-known work in mechanical engineering and hydraulics confirms his reputation as a competent specialist capable of conveying complex technical ideas to a wide audience. In today's world, where automation and energy efficiency occupy key positions, the book "Volume hydraulic and pneumatic machines" U. A. Andreevets becomes an urgent recommendation for those who want to be aware of the latest achievements and technologies It reveals not only the basics, but also the prospects for the development of this area, making it relevant and in demand. If you are looking for a book that will help you understand how volumetric hydraulic and pneumatic machines work, and why they remain indispensable in the industry, then this work is exactly what you need.