曲轴外延，包括前端的驱动，以及未上漆的安装导向的表面都应当刷指定的产品来进行保护。

Crankshaft extension, including front drives, and unpainted mounting pilot surfaces shall be protected by brushing on specified products.

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接着详细介绍了系统的软件设计，包括前端播控软件、接收模块的软件设计、USB驱动程序设计、文件接收机制等。

Then the software design is explained, including head-end system software, DVB module software, USB driver program and file receive mechanism.

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