TJ Mechanical engineering and machinery 41 Machine design and drawing 7 Engineering machinery, tools, and implements 4 Materials of engineering and construction 4 Composite materials 3 Concrete 3 Nuclear engineering. Atomic power 3 Antennas 2 Apparatus and materials 2 Applications of electric power 2 Atomic physics. Constitution and properties of matter 2 Building materials 2 Machine construction (General) 2 Mechanics applied to machinery. Dynamics 2 Mechanics of engineering. Applied mechanics 2 Strength and testing 2 Acoustics in engineering. Acoustical engineering 1 Architectural engineering. Structural engineering of buildings 1 Biochemical engineering. Bioprocess engineering 1 Biodiesel fuels 1 Bioengineering 1 Biomaterials 1 Building fittings and their installation 1 Carbon nanotubes. Nanoparticles. Nanostructured materials 1 Descriptive and experimental mechanics 1 Details in building design and construction.Including walls, roofs 1 Detectors. Sensors. Sensor networks 1 Dynamic loading conditions. Structural dynamics. Vibrations 1 Earthwork. Foundations 1 Electric apparatus and materials. Electric circuits. Electric networks 1