Glossary H

Heat treatment is characterized as a combination of heating and cooling operations applied to a metal or alloy in the solid state to obtain desired conditions or properties.

Harp is described as one of the largest of all string instruments. It is musical instrument consisting of a triangular frame furnished with strings and sometimes with pedals, held upright, and played with the fingers.

HVAC --->Heating, Ventilation, and Air Conditioning.

Housing is described as structures collectively; structures in which people are housed, living accomodation, dwelling units.

High learning products are identified as items that require education or instruction before being able to operate, an example would be a computer.

Hood is a generic term for a device designed to capture contaminated air and conduct it into an exhaust duct system.

Honey extractor is described as a machine which removes honey from the cells of comb by centrifugal force.

Hoist brake is desribed as an electrically activated device which, when deactivated, serves to stop hoist motion by friction.