They convert units of heat into useable engineering units that serve as input signals for process controllers and recorders.

他们将热量单位转换成可用的工程单位，作为过程控制器和记录器的输入信号。

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These are the helicopters, engineering units and the military medical hospitals that make it possible for troops to do more than they could on their own.

UN: Secretary-General

Later on, successful buyers can simply swap their engineering units in for a final version of the 16GB or 32GB Xiaomi Phone 2 -- the latter a new addition that co-founder Lei Jun announced on Sina Weibo last Saturday (where he also cheekily asked if anyone need a 64GB flavor).

ENGADGET: Xiaomi Phone 2 pre-production units available on September 22nd, limited to 600 lucky buyers

The offshore and engineering business builds floating units, fixed platforms, pipelines facilities and offshore installations.

FORBES: Hyundai Heavy Industries