双导轨自动安装系统，它给安装、维修带来了极大的方便，人可不必为此而进出污水坑。

Automatic installation of dual-rail system, it gives the installation, maintenance has brought great convenience, but this may not have access to the sump.

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这个测量放大器是设计安装在控制机箱内，也可以安装在由挤压型材制成的顶帽式导轨外壳的承载轨上。

The measurement amplifier is designed to be installed in a control cubicle and can be put on a carrying rail in a top hat rail housing made of extruded sections.

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电梯导轨安装精度以往多采用吊线锤法，一般很难保证导轨的安装精度，且费时、费力。

Using traditional plumb lines in elevator guide rails' installation is difficult to ensure the installation accuracy, wasting time and Labour.

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