Railroad siding A length of railroad track that is connected to the main track. Resin A polymer synthesized from petroleum or natural gas derivatives. Skimmer A motor-driven paddle device consisting of several rectangular paddles and a drive system. The paddles skim pellets from water surface into a containment system. Thermoplastic Resins Resins that can be melted or reprocessed without damaging or changing the chemical or physical properties of the polymer.
Resins are highly malleable but become rigid when cooled.
Thermoset Resins Resins that tend to be rigid, infusible, and insoluble, and cannot be remelted and reformed. A mechanical device that controls the level and flow of water by using dams or similar mechanical devices.