主动力单元（PPU）是一种可搭载空中和公路运输，拖车式1.3MW （兆瓦）发电机组，这也是终端高空防御系统（THAAD）的关键组成部分。

The Prime Power Unit (PPU) is an air- and highway-transportable, trailer-mounted 1.3MW (megawatt) Generator Set, a key component of the Terminal High Altitude Air Defense (THAAD) system.

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他们进入黑黑的散发着霉味的功能室.格蕾丝启动发电机 打开灯和设备.里面有双层床、挤在一起的凌乱不堪的科研装置、两个链接单元.

Grace starts the genny and turns on the lights and equipment. There are bunkbeds, a cramped clutter of scientific gear

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介绍一种基于PLC为风力发电机主控单元，适于风电场集群控制的有效方法。

This paper introduces an effective method suitable for wind farm central control which USES PLC as the wind turbine generators main control unit.

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