This article introduces the performance testing device on the railway wrecking car WYZ-8A active control valve board, and explains the testing method of each performance test in details.

介绍了铁路救援机车WY Z - 8a型主控制阀板的性能测试装置，详细说明了各项性能测试的试验方法。

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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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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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