TJ Mechanical engineering and machinery 3 Electric apparatus and materials. Electric circuits. Electric networks 2 Machine construction (General) 2 Physical and theoretical chemistry 2 Acoustics in engineering. Acoustical engineering 1 Beam dynamics. Particle beams 1 Chemicals 1 Detectors. Sensors. Sensor networks 1 Devices for production of electricity by direct energy conversion 1 Dielectrics 1 Electricity and magnetism 1 Environmental protection 1 Inorganic chemistry 1 Inorganic polymers 1 Malaysia 1 Materials of engineering and construction 1 Mechanics applied to machinery. Dynamics 1 Organic chemistry 1 Polyethylene 1 Production of electricity by direct energy conversion 1 Production of electricity directly from chemical action 1 TP Chemical technology 1 Thermodynamics 1 Transmission. Heat transfer 1