Low or medium Btu content gas, composed mainly of carbon monoxide, nitrogen(2), and hydrogen(2) made by the gasification of wood or coal.

Equipped to extract petroleum, e.g. oil production ship.

The elements and compounds that result from the combustion of a fuel.

Anchor pattern on a surface produced by abrasive blasting or acid treatment.

Estimated account

Single tariff item, established to move multiple commodities needed for a specified project, usually construction.

The net south-facing glazing area projected on a vertical plane. Also, the solid area covered at any instant by a wind turbine's blades from the perspective of the direction of the windstream (as opposed to the swept area).

A blast of from 4 to 6 seconds' duration.

Programmable Read-Only Memory. Read-only memory which can be programmed by the user using a special hardware programmer.

Propeller

Propeller.

Sideward force created by a spinning propeller.

A hydrocarbon gas, C3H8, occurring in crude oil, natural gas, and refinery cracking gas. It is used as a fuel, a solvent, and a refrigerant. Propane liquefies under pressure and is the major component of liquefied petroleum (LPG).

A rotating device, with two or more blades, that acts as a screw in propelling a vessel. Sometimes called a screw.

A turbine that has a runner with attached blades similar to a propeller used to drive a ship. As water passes over the curved propeller blades, it causes rotation of the shaft.

A rotation anemometer which has a horizontal axis upon which helicoidal shaped vanes are mounted. See windmill anemometer.

Movement of crest of a progressive wave. Can also refer to radio waves.

A reversing thermometer which is encased in a strong glass outer shell that protects it against hydrostatic pressure. Compare to unprotected thermometer.

The threshold value of the corrosion potential that has to be reached to enter a protective potential range. The term used in cathodic protection to refer to the minimum potential required to supress corrosion.

A range of corrosion potential values in which unacceptable corrosion resistance is achieved for a particular purpose.