Some, like carpenter ants, can undermine a home structure, while others interfere with the electrical units.

一些蚂蚁，比如木蚁，会破坏房屋结构，而另一些蚂蚁则会干扰电器装置。

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The methods and steps in installing and adjusting the mechanical, optical and electrical units are briefly explained.

还简要地说明了机械、光学及电器部件安装、调试的方法和步骤。

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The mine hoist equipment is one of the main mine pit production equipment. It is a set of complex mechanical electrical units and the main tool of coal production and transportation.

矿井提升设备是矿井生产的主要设备之一，是一套复杂的机械电气机组，是煤炭生产运输的主要工具。

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Seeing an opportunity to provide this highly valuable utility for emergency and regular power, Mr. Workman and a smart team of engineers launched a new company, GoalZero , to develop portable solar powered electrical units.

FORBES: GoalZero -- How To Create An Industry (And A Profit) By Doing Good

Since the 1920s the emphasis has been on increasing conventional generating unit size up to a now optimal size of 600, 000 kW. These must employ transmission and distribution lines to integrate electrical loads which almost always are much smaller, and also to integrate generating units to permit reserve sharing.

FORBES: Who Sued Bloom Energy?

But other companies, such as units of United Technologies and other vendors, contribute to the plane's extensive electrical system.

CNN: Quick fix for Dreamliner looks less likely, experts say