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Library of Congress Subject Areas (9161)
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  - TC Hydraulic engineering. Ocean engineering (64)
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  - TE Highway engineering. Roads and pavements (65)
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  - TH Building construction (331)
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    - TH9025-9092 Protection of buildings (5)
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  - TJ Mechanical engineering and machinery (720)
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  - TK Electrical engineering. Electronics Nuclear engineering (1348)
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    - TK7800-8360 Electronics (428)
    - TK9001-9401 Nuclear engineering. Atomic power (1)
  - TL Motor vehicles. Aeronautics. Astronautics (136)
    - TL1-484 Motor vehicles. Cycles (75)
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  - TN Mining engineering. Metallurgy (35)
  - TP Chemical technology (380)
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  - TR Photography (5)
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- U Military Science (2)
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