Chinese language 2 Machine design and drawing 2 Phonetics 2 TJ Mechanical engineering and machinery 2 Acoustics in engineering. Acoustical engineering 1 Applications of electronics 1 Architectural acoustics 1 Children in rural areas. Rural education. Rural schools 1 Comparative grammar 1 Control engineering systems. Automatic machinery (General) 1 Education of special classes of persons 1 Engineering mathematics. Engineering analysis 1 Extraction 1 Indigenous peoples 1 LG Individual institutions 1 Language. Linguistic theory. Comparative grammar 1 Machine shops and machine shop practice 1 Mandarin dialects 1 Mosques 1 Musical research 1 NA Architecture 1 P Philology. Linguistics 1 Philosophical and societal aspects of music. Physics and acoustics of music. Physiological aspects of music 1 Phonology. Phonetics 1 Space (Architecture). Public spaces 1 Stress (Physiology). Stress management 1 Tone 1