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| Ram |
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A single-acting cylinder with a single diameter plunger rather than a piston and rod. The plunger in a ram-type cylinder.
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| Ration |
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A 24-hour allotment of feed for an animal. A ration may be fed as a complete ration, or it may be made up of grazing plus a balancing supplement.
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| Receiver |
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Head of a scanner that monitors the infrared signals transmitted by the transmitter head.
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| Reciprocation |
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Back-and-forth straight line motion or oscillation.
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| Recoverable heat |
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Heat energy from combustion that is actually recovered to do useful work.
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| Recovery (product) |
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An expression of the amount of product (nominal or actual) that can be manufactured from a given input of raw material.
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| Recovery boiler |
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A boiler that recovers process chemicals for re-use and creates process steam with the heat it generates.
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| Regenerative circuit |
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A piping arrangement for a differential type cylinder in which discharge fluid from the rod end combines with pump delivery to be directed into the head end.
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| Relative Feed Value (RFV) |
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Is a way to compare the potential of two or more like forages for energy intake. RFV has no units.
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| Relative humidity |
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Ratio of the amount of water vapour present in the air to that which the air would hold at saturation at the same temperature. It is usually considered on the basis of the weight of the vapour but, for accuracy, should be considered on the basis of vapour pressures.
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| Relief |
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Also known as Counterbore Depth. Refers to different shapes and depth configurations of the outlets of a pellet die hole. Types include: Straight/Standard, Tapered and Variable Relief.
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| Relief valve |
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A pressure operated valve which by-passes pump delivery to the reservoir, limiting system pressure to a predetermined maximum value.
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| Rendering |
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The breaking down of animal tissues into constituent fat and protein elements, whether by the application of heat and pressure or otherwise.
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| Replenish |
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To add fluid to maintain a full hydraulic system.
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| Resin |
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An ingredient of coatings which acts as a binder and gives the coating physical properties such as hardness and durability.
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| Resolution |
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The smallest unit used for taking measurements from a scanner or the encoder.
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| Restriction |
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A reduced cross-sectional area in a line or passage which produces a pressure drop.
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| Return line |
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A line used to carry exhaust fluid from the actuator back to sump.
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| Reversing valve |
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A four-way directional valve used to reverse a double-acting cylinder or reversible motor.
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| Roller |
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A cylindrical body movable about its longitudinal axis.
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| Rotary actuator |
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A device for converting hydraulic energy into rotary motion - a hydraulic motor.
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| Roughage |
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A misleading term that is often used to describe the fiber content of a diet leading to believe that its only purpose in a ration is to aid digestion.
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| RPM |
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Revolutions per minute.
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| RTD |
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A temperature measuring device that measures the change in electrical resistance to determine temperature (resistive thermal device).
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| Rumen |
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The first compartment of four compartments of a ruminant animal’s stomach. The rumen serves as the primary site of food fermentation. Also referred to as the forestomach or paunch.
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| Rumen Degradable Protein (RDP) |
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That portion of the consumed protein that is degraded or digested in the rumen by microbes to ammonia and amino acids. It may also be referred to as degradable intake protein (DIP).
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| Rumen Undegradable Protein (RUP) |
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See By-pass Protein
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| Ruminant |
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Animal that chews the cud (partly digested food) regurgitated from its rumen, and has a stomach of four compartments. Cattle, sheep, goats, deer, and elk are ruminants.
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| Rung |
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An element of the PLC ladder logic program. Each rung looks at input signals and turns output signals on or off. The program runs by scanning the ladder logic, testing the input points and the instructions on each rung, and turning the output points on or off.
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| Rye |
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A grain crop used for bread flour and for animal feed.
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