合同还包括了该雷达18年使用周期内的支持和维护，确保该雷达与有关基础设施在使用周期内至少拥有98%的作战能力。

It also includes the sustainment and the maintenance of the installation for a period of 18 years, with guaranteed levels of operational availability of 98% for the radar and its infrastructure.

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数十年来，程序员们使用模型-视图-控制器简化了代码结构，并使得维护任务更加容易。

Programmers have simplified their code structure and eased maintenance tasks with Model-View-Controller for decades.

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所有部件均经过特殊防氧化处理，不生锈、耐化学物质腐蚀，接头为坚实的喷丸铸件，产品使用寿命高达30年以上，无须维护。

All parts of the ladderspan are anti-oxygenation, with interlocks made by casting of spray pellet, which provides itself a lifespan of 30 years more.

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