While medium pressure and the upstreamend of the resilient and flexible structures to increase the downstream end of the valve seat seal.
同时介质压力与上游端挠性结构的回弹力又增加了下游端阀座的密封。
2
Lastly, studies transportation characteristic of bed load sediment of upstreamend before vegetation dam. Preliminarily clear sand-binding mechanism of vegetation "flexible dam".
最后对植物坝前上游段推移质泥沙的输移特性进行了研究，初步探明了植物“柔性坝”的固沙机理。
3
In an alternative embodiment, the present invention provides for the coating of the upstreamend of a catalytic member by the overcoat layer, thereby creating an upstream poison capture zone.