The research, federally funded by the National Science Foundation, could improve the safety and reliability of spacecraft that operate in the upper atmosphere.

此项研究由美国国家科学基金会拨款，旨在提高航天器在高层大气中运行时的安全性和可靠性。

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This article introduces the application of PLC timer for end station protection in double speed lift. The methods can improve the safety reliability of the lift.

本文介绍了PL C定时器在双速电梯端站保护中的应用。这种方法能提高电梯的安全可靠性。

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So analysis and improve the reliability and safety of the metro power supply system has come to more attention.

因此，分析和提高整个地铁供电系统的可靠性与安全性成为越来越需要关注的课题。

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We will participate in industry-wide efforts to improve the safety and reliability of subsea blow-out preventers and deep water drilling practices.

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