A naval ship electric propulsion unit is a complex ship-machine-electricity system.

舰船电力推进是一个复杂的船—机—电系统。

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Vehicle drive system, vehicle propulsion unit, method and control program for operating a vehicle drive system.

车辆传动系统，车辆传动单元，使车辆传动系统运行的方法及控制程序。

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A planetary gearbox for a Marine propulsion unit or an earth moving unit, comprises a hollow wheel gear 1, two or more planet gears 2, and a sun gear 3.

一种用于船舶动力装置或土方运输装置的行星齿轮箱，其包括空心齿轮1、两个或更多行星齿轮2以及太阳齿轮3。

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But this capsule will need a propulsion unit to guide its path across space.

BBC: European tech could propel Nasa's Orion capsule

The ATV has two major divisions - a pressurised payload unit, and an avionics and propulsion unit.

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European engineers believe they could contribute to this project by providing the propulsion unit that pushes the rocket's capsule to these locations.

BBC: European tech could propel Nasa's Orion capsule