It points out that under current situation, the optimum design of electric propulsion ship's central cooling system will raise the reliability and economy of system operation.

在目前条件下，通过对电力推进船舶中央冷却系统的优化设计，将会提高系统运行的可靠性和经济性。

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"It was a central cooling system, so there was nothing anyone could do, " he says.

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Data also showed a warming in the equatorial Pacific, cooling in the central North Pacific and general cooling the Southern Hemisphere.

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Heating and cooling experts say central air-conditioning systems should be serviced annually to remove dirt, change filters and check the level of Freon, a refrigerant.

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