-
457.
Heat pumps
Subjects
Heating installationsPumping machineryThermodynamics
-
458.
Heat recovery
Subjects
Cogeneration of electric power and heat
-
459.
Heat storage
Subjects
Heat engineering
-
460.
Heat-engines
Subjects
EnginesHeat engineering
-
461.
Heating
Subjects
Home economicsEnvironmental engineering (Buildings)FireHeat engineering
-
462.
Helicopters
Subjects
AeronauticsFlying machines
-
463.
Helmets
Subjects
Armor
-
464.
High density lipoproteins
Subjects
Blood lipoproteins
-
465.
High performance computing
Subjects
Computer science
-
466.
High pressure (Technology)
Subjects
High pressure (Science)Industrial chemistry
-
467.
High speed trains
Subjects
Railroad trains
-
468.
High technology
Subjects
Technology
-
469.
High technology industries
Subjects
Industry
-
470.
High-fidelity
Subjects
ElectronicsDigital sound recording and reproducing
-
471.
History of the engineering
Subjects
History of technology
-
472.
Hoes
Genre/Form
Ethnographic objects
-
473.
Hoisting machinery
Subjects
Machinery
-
474.
Home automation
Subjects
Electronic control
-
475.
Home telecare
Subjects
-
476.
House drainage
Subjects
Sanitary engineering
-
477.
House furnishings
Subjects
-
478.
HTML editors (Computer programs)
Subjects
Text editors (Computer programs)
-
479.
Hybrid computers
Subjects
Computers
-
480.
Hybrid electric vehicles
Subjects
Electric vehicles
Last updated dated: 21/02/2026