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gptkbp:isRelatedTo
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propulsion systems
battery systems
communication systems
cooling systems
sewage systems
electrical systems
fuel systems
mechanical systems
safety systems
hydraulic systems
ventilation systems
crew accommodations
waste management systems
freshwater systems
sonar systems
fire control systems
steering systems
torpedo tubes
emergency systems
ballast tanks
periscopes
emergency escape systems
engine systems
hull systems
navigation_systems
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