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| Uninterruptible power supply (UPS) |
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Provides conditioned power and battery backup for computers in the case of a power failure or brownout.
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| Unload |
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To release flow (usually directly to the reservoir), to prevent pressure being imposed on the system or portion of the system.
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| Unloading valve |
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A valve which by-passes flow to tank when a set pressure is maintained on its pilot port.
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