The flight control system based on CAN bus does not only save hardware cost and installation cost, but also save its later maintenance cost.

基于CAN总线的飞行控制系统不仅可以节约硬件成本和设计、安装费用，同时还可以节约系统软硬件的后期维护费用。

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A set of relay protocols are designed to make the system have relay function, which spread the work range of concentrator and reduce the costs of installation and maintenance.

同时设计了一套中继通讯协议，使终端具有中继功能，扩充了集中器的管理能力，降低了安装和维护费用。

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Intercom system and a variety of weak category, installation, maintenance, systems engineering.

对讲系统及各种弱电类的，安装，维护系统工程。

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Students in the program learn to use computer-aided-drafting (CAD) to design a photovoltaic system, they learn about the sorts of issues that come up when designing such a system, and they learn about the installation and maintenance of such systems.

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