The perimeter seat design gives bubble tight shutoff in either direction.
这种全周长阀座结构能够实现任何方向的气泡级密封关闭效果。
Precision machined tilting disc and seat for tight shutoff in reverse flow direction.
精密机加工的倾斜式阀瓣和阀座，适用于逆流的紧密关闭。
Simulations show that using the improved explicit guidance, the working time of the engine is increased while the direction of the thrust near shutoff keeps stable.
仿真表明，采用改进的显式制导，发动机工作时间有所增加，但邻近关机时推力方向平稳。
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