-provides moderate air system to the cable.
According to WikiPedia, Trough may refer to:
- Trough (economics), the lowest turning point of a business cycle
- Trough (food), a container for animal feed (syn: manger)
- Trough (geology), a long depression less steep than a trench
- Trough (meteorology), an elongated region of low atmospheric pressure
- Trough (physics), the lowest point on a wave
- Langmuir-Blodgett trough, a laboratory instrument
- Trough (depression), a term describing someone in a depression
- Trough (structure), aka Deep Trough, corrugated metal element to stiffen metal plates. Commonly used to longitudinally stiffen the interior of steel bridge sections.
- Trough (pharmacology), the minimum or "trough" concentration (Cmin) of a drug observed after its administration and just prior to the administration of a subsequent dose in a multiple dosing study.