These Industrial Drawing practical sessions are designed to study different mechanical assemblies with the aim of understanding both their structure and their operation. To achieve this, the function of each assembly has been analyzed, as well as the relationship between its components to ensure the correct operation of the mechanism. In addition, the learning process has been supported through explanatory videos showing the actual movement of the assemblies, making it easier to understand how they work. Another key aspect of the practical sessions has been the study of the assembly and disassembly process of the different mechanical assemblies. This analysis makes it possible to identify the correct assembly sequence of the parts, understand the function of the joining elements, and appreciate the importance of a design that facilitates both the manufacturing and maintenance of the mechanisms. Furthermore, the assemblies have been graphically represented through technical drawings, correctly interpreting each of the represented elements. Finally, throughout the practical sessions, the main criteria established by industrial drawing standards have been applied, paying particular attention to the selection of the appropriate scale, the correct dimensioning of the parts, the definition of dimensional tolerances, the indication of surface finishes, and the use of standardized symbols. This has made it possible to produce precise, clear, and standardized technical documentation in accordance with the standards commonly used in engineering and industrial manufacturing.