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Mechanisms are mechanical systems used on spacecraft and/or ground support equipment for spacecraft. The mechanisms may be manually (for example, ISS personnel airlock hatches), electrically (for example, ISS Common Berthing Mechanism latches), hydraulically (for example, shuttle Orbiter landing gear uplock hooks), or pneumatically actuated (for example, shuttle Orbiter 17" feedline disconnect valve latches).

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How do satellite motors keep themselves cool and lubricated?

Satellites never use Internal combustion engines like in cars (obviously they do have propulsion engines that require combustion for station-keeping purposes) in them, they mostly use solar-power and …