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A unit of a radar set which demodulates received radar echoes, amplifies the echoes and delivers them to the radar indica- tor. A radar receiver differs from the usual superheterodyne communications receiver in that its sensitivity is much greater; it has a better signal noise ratio, and it is designed to pass a pulsetype signal.

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The electric dipole moment induced in a system, such as an atom or molecule, by an electric field of unit strength.


A unit of line density (mass per unit length) equal to 1 pound per inch, or approximately 17.8580 kilograms per meter.


Abbreviated pt. 1. A unit of volume, used in the United States for measurement of liquid substances, equal to 1/8 U.S. gallon, or 231/8 cubic inches, or 4.73176473 10 4 cubic meter. Also known as liquid pint (liq pt). 2. A unit of volume used in the United States for measurement of solid substances, equal to 1/64 U.S. bushel, or 107,521/3200 cubic inches, or approximately 5.50610 10 4 cubic meter. Also known as dry pint (dry pt). 3. A unit of volume, used in the United Kingdom for measurement of liquid and solid substances, although usually the former, equal to 1/8 imperial gallon, or 5.6826125 10 4 cubic meter. Also known as imperial pint.


A mass of reinforced concrete cast around the head of a group of piles to ensure that they act as a unit to support the imposed load.


A unit of pressure equal to 1 sthe`ne per square meter, or to 1000 pascals. Abbreviated pz.


Wages paid per unit of production.


Also known as pole; rod. 1. A unit of length, equal to 5.5 yards, or 16.5 feet, or 5.0292 meters. 2. A unit of area, equal to 30.25 square yards, or 272.25 square feet, or 25.29285264 square meters.


Theratio,expressed as a percentage, of dry unit weight of a soil to maximum unit weight obtained in a laboratory compaction test.


A unit of mass equal to 1/20 troy ounce or to 1.55517384 grams; the term is employed in the United States and in England for the valuation of silver, gold, and jewels. Abbreviated dwt; pwt.


A unit which measures dust concentrations in emissions from furnaces, kilns, cupolas, and scrubbers.

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