A device that removes contaminants, by mechanical filtration, from the fresh air stream before the air enters the living space. Filters can be installed as part of a heating/cooling system through which air flows for the purpose of removing particulates b ...

A measure of the number of cycles or wavelengths of electrical energy per second; U.S. electricity supply has a standard frequency of 60 hertz.

A room heat delivery (or exchanger) component of a hydronic (hot water or steam) heating system; hot water or steam is delivered to it by natural convection or by a pump from a boiler.

The attenuation of light.

Central Dredging Association

A cleat designed to hold a line in place without slipping. It consists of two narrowing jaws with teeth in which the line is placed.

A large foresail which extends aft behind the mast.

A charge made for lifting articles too heavy to be lifted by a ship's normal tackle.

The potential of a reversible oxidation-reduction electrode measured with respect to a reference electrode, corrected to the hydrogen electrode, in a given electrolyte.

The severe loss of ductility of a metal resulting from corrosive attack, usually inter,granular and often not visually apparent.

A company's expenditure to acquire capital.

Free In Wagon

A keel that is narrow and deeper than a full keel.

In financial services, the period after signing a contract during which customers are entitled to.

ISM International Safety Management Code (ISM Code)

Person In Charge

Routine broadcast of meteorological information for aircraft in flight.

A type of heat pump that uses the ground, ground water, or ponds as a heat source and heat sink, rather than outside air. Ground or water temperatures are more constant and are warmer in winter and cooler in summer than air temperatures. Geothermal heat p ...

That part of an audio-modulated radiosonde consisting of the baroswitch, the sensing elements, the reference elements, and the relay.

A type of motor designed to operate precisely at the synchronous speed with no slip in the full-load speeds (rpm).