Concept information
Preferred term
621Mechanical engineering in general. Nuclear technology. Electrical engineering. Machinery
Broader concept
Narrower concepts
- 621.3 Electrical engineering
- 621.6 Fluids handling, storage and distribution plant and techniques
- 621.4 Heat engines (except steam engines)
- 621.1 Heat engines in general. Generation, distribution and use of steam. Steam engines. Boilers
- 621.22 Hydraulic energy. Water power. Hydraulic machinery
- 621.8 Machine elements. Motive power engineering. Materials handling. Fixings. Lubrication
- 621.7 Mechanical technology in general: processes, tools, machines, equipment
- 621.5 Pneumatic energy, machinery and tools. Refrigeration
- 621.9 Working or machining with chip formation. Abrasive working. Hammers and presses
Notation
- 621
In other languages
URI
http://udcdata.info/041674
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