The paper mainly discusses the automatic switching of the logic estimation circuit of the drum boiler's water level protection system.

文章主要讨论了锅炉汽包水位高低保护系统逻辑判断回路的自动切换。

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This paper Outlines the computer monitoring system and relay protection system of Shuiquan Bay pumping station for level ground water diversion project, and system configuration and main function.

概述了坪上输水工程水泉湾泵站的计算机监控系统、继电保护系统以及系统的配置和主要功能。

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Therefore, the maintenance of the boiler water level in a given range is the protection necessary for safe operation of boilers, boiler properly one of the key indicators of.

因此，维持锅炉汽包水位在给定范围内是保护锅炉安全运行的必要条件，也是锅炉正常运行的主要指标之一。

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The Boogie Board Jot Jacket is a fitted water-resistant neoprene sleeve that provides the highest level of protection and is ideal for taking the Boogie Board Jot eWriter wherever you go.

ENGADGET: Boogie Board Jot eWriting pad hands-on (video)

Yorkshire Water claims the station at Kingswood would provide five-times the level of flood protection for the area.

BBC: Yorkshire Water to appeal over pumping station plan