URI
Notation
621.22
Caption
Hydraulic energy. Water power. Hydraulic machinery
Including
Water wheels. Water turbines
Scope Note
Class here machinery driven by water, and the use of water as a driving force
Application Note
For details of machinery and processes use special auxiliary numbers 62-1/-9
See also
62-8Machines according to motive power, propulsive force. Source of energy of machine
620.9Economics of energy in general
621.3Electrical engineering
627.8Dams. Hydraulic power plant works
Broader class
621  Mechanical engineering in general. Nuclear technology. Electrical engineering. Machinery