This paper introduced that the structure, testing principle and boundary design of the system software for test system of the performance core of security valve.

介绍了安全阀铁心磁性能测试系统的结构、测量原理。系统软件界面设计。

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The development of the ceramic coat plug valve core which substrate USES 45 steel is introduced.

介绍了基体采用45钢，表面喷涂工程陶瓷的旋塞阀芯的研制情况。

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The damage and corrosion of titanium regulating valve is described and the fracture cause of valve core is analyzed.

介绍了钛调节阀的损坏和腐蚀情况，分析了阀芯的断裂原因。

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That thinking changed on March 28, 1979, when a small valve stuck open, cooling water escaped and the reactor core of TMI's Unit 2 began to melt.

CNN: Three Mile Island, 20 years later

Even in the PC space, however, some think Valve will need to grow beyond its core demographic of male gamers who download full PC games.

FORBES: Valve And Steam Worth Billions