A pipe, tube or channel that conveys a substance (such as air throughout a building).2. Tubes used to move air, such as to ventilate an enclosed area.

In the US, federal and state taxes on the sale or production of certain types of products such as.

A general term for provisions, materials and supplies used aboard ship for the maintenance of the crew, and for the navigation, propulsion and upkeep of the vessel and its equipment.

A valve which connects the high pressure side of a compressed air system to the suction side and is adjusted so as to maintain a specific pressure on the suction side by controlled bleeding of hot gas to the suction side.

The proportion of a share portfolio at risk in a certain area. So of you have half of your portfolio.

Insurance which extends the term of a warranty, typically covering repairs on appliances and cars,.

An income tax coding allocated to people who pay tax at the higher rate.

The device in an air conditioner or heat pump in which the refrigerant condenses from a gas to a liquid when it is depressurized or cooled.

An insulation product made of a fibrous material or plastic foams, pressed or extruded into board-like forms. It provides thermal and acoustical insulation strength with low weight, and coverage with few heat loss paths.

See: 'Cat.

A rating used by banks, insurance companies, mortgage companies and other financial institutions.

The compressor is started automatically, depending on demand. Control panel is energized with no "pre-start" cycle required, as pre-lubrication pump and buffer (seal) air are always "on". A state of pre-start exists. Steam turbine compressors are "slow-ro ...

A bond, issued and underwritten by international syndicates of banks and issuing houses and sold to.

A broker who buys and sells shares on the instructions of clients but who offers no advice about.

Diffuse solar radiation which has the same intensity in all directions.

Radiation with wavelengths greater than 4 microns. (In meteorology, same as infrared radiation.)

Used to describe a light that blinks on and off, where the period of light is shorter than the period of darkness separating the flashes.

In lore, the flag flown by a pirate ship - a white skull on a black background with crossed bones below the skull - although there is no evidence that such a flag was ever flown.

To luff or luff up is to head into the wind, causing sails to flutter.

Small charts showing tidal stream directions and rate of flow.