A filler added to acetylene cylinders, capable of absorbing 25 times its own volume of acetylene.
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OXYACETYLENE TORCH
A torch that mixes acetylene and oxygen to produce a hot flame for the welding or cutting of metal. Also known as atomized kerosine for combustion.
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OXYACETYLENE CUTTING
The flame cutting of ferrous metals in which the preheating of the metal is accomplished with a flame produced by an oxyacetylene torch. Also known as acetylene cutting.
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OMNIGRAPH
An automatic acetylene cutter controlled by a mechanical pointer that traces a pattern; capable of cutting several duplicates simultaneously.
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LOW-PRESSURE TORCH
A type of torch inwhich acetylene enters a mixing chamber, whereit meets a jet of high-pressure oxygen; theamount of acetylene drawn into the flame is con-trolled by the velocity of this oxygen jet. Also known as injector torch.
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HIGH-PRESSURE TORCH
A type of torch in which both acetylene and oxygen are delivered to the mixing chamber under pressure.
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ACETYLENE
A colourless gas (C2H2) prepared by the action of water with calcium carbide. Acetylene is used in gas welding and cutting.
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PISTON DISPLACEMENT
The volume which a piston in a cylinder displaces in a single stroke, equal to the distance the piston travels times the internal cross section of the cylinder.
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PINT
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.
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PIEZOMETER
1. An instrument for measuring fluid pressure, such as a gage attached to a pipe containing a gas or liquid. 2. An instrument for measuring the compressibility of materials, such as a vessel that determines the change in volume of a substance in response to hydrostatic pressure.
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PACKAGING DENSITY
The number of components per unit volume in a working system or subsystem.
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