Damper: both gas flow regulating button and wind board are high grade PP material, connected with 304 stainless steel bar, manually adjust the outside valve knob, control air flow.

气流调节阀：气流调节扭与挡风板均为高密度PP材质，用304不锈钢方棒连接，手动调节外部阀门旋钮，控制气流量。

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Valve Disadvantages: the valve is prone to leakage around the stem, especially in-board leakage when a vacuum is pulled on the valve outlet.

阀门的缺点：当阀门排气口处是真空时，阀门在阀杆附近容易泄漏，特别是内部泄漏。

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Introducing the properties of goggle type board Plug valve, analyzing the characteristics of the valve, proposing the methods of improving sealing structure.

介绍了眼镜式插板阀的性能，分析了该阀门的密封特点，提出了改进密封结构的方法。

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The Oculus team just got bigger by two, with software engineer Tom Forsyth, formerly of Valve, and robotic scientist Dr. Steve LaValle of the University of Illinois both jumping on board.

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