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| Compression fitting
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A kind of tubing or pipe connection where a nut, and then a sleeve or ferrule is placed over a copper or plastic tube and is compressed tightly around the tube as the nut is tightened, forming a positive grip and seal without soldering. Also a flexible connector that has a nut and gasket designed to attach directly to an SAE standard compression thread, without the use of a sleeve or ferrule. |
| Compression set
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Caused when wood strips or parquet slats absorb excess moisture and expand so much that the cells along the edges of adjoining pieces in the floor are crushed. This causes them to loose resiliency and creates cracks when the floor returns to its normal moisture content. |
| Compression valve
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A type of valve that is often used for water faucets. It is opened or closed by raising or lowering a horizontal disk by a threaded stem. |
| Compression washer
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| Compressive fracture test
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Casting of a concrete cylinder under exact conditions with a specific level of comprehensive load applied, after the concrete has cured, to test its strength. |
| Compressive strength
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A material's ability to withstand a load measured in psi. |
| Compressor
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A device used to compress air for mechanical or electrical power production, and in air conditioners, heat pumps, and refrigerators to pressurize the refrigerant and enabling it to flow through the system. |
| Compressor, centrifugal
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Compressor that compresses gas by use of speed and centrifugal force. |
| Compressor, reciprocating
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Compressor that compresses gas by use of a moving piston in a cylinder. |
| Compressor, roots type
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Positive displacement compressor of gas, comprised of a tight-fitting housing around two spiral intermeshed rotors . |
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