TJ Mechanical engineering and machinery 25 Machine construction (General) 3 Mechanics applied to machinery. Dynamics 3 Aeronautics. Aeronautical engineering 2 Finite element method 2 Machine design and drawing 2 Mechanical and electrical engineering combined 2 Pneumatic machinery 2 Acetone 1 Biotechnology 1 Carbon nanotubes. Nanoparticles. Nanostructured materials 1 Criminology 1 Energy consumption 1 Engineering machinery, tools, and implements 1 Exploitation and utilization (Including timber trees, fuelwood, logging, transportation, valuation) 1 Forest products. Lumber. Logging 1 Fruit and fruit culture 1 Fruit trees 1 H Social Sciences (General) 1 L Education (General) 1 Laboratories. General works 1 Machine tools and machining 1 Machinery exclusive of prime movers 1 Materials of engineering and construction 1 Mechanical devices and figures. Automata. Ingenious mechanisms.Robots (General) 1 Metal manufactures. Metalworking 1 Microfluidics and microfluidic devices 1 Microwave communication systems 1 Miscellaneous motors and engines.Including gas, gasoline, diesel engines 1 Motor vehicles. Cycles 1