AC power propulsion systems have the requirements of high efficiency, low harmonics and noise.

电力推进系统的设计需满足高效率、低谐波和低噪声的要求。

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Reliability is a important index to electric power propulsion system, which decides the ship life force and battle effectiveness.

可靠性是电力推进系统的一项重要指标，直接决定着舰船的生命力和战斗力。

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The excellent characterics of power batteries and the appearance of new battery systems will promote electric power propulsion systems going to new application fields also.

动力电池优异本性和新电池体系的出现又促进了电力推进系统进入新的应用领域。

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Throughout, the power, propulsion and communications systems were uninterrupted, the company said.

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As our knowledge improves, we'll develop new power generation, propulsion, life support and other systems that can support more distant travels.

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Considered an entirely new class of vessel, it would rely on superconducting machinery for propulsion and power generation.

ECONOMIST: MONITOR