Instead the pump impeller should be trimmed or valves located else where in the system to partially throttle the flow.
代替泵叶轮应该经过修整，或者阀门应该位于系统部分节流的地方。
Soft start valves are used to throttle the gas flow in roughing lines. They prevent turbulences in piping and containers, particulate contamination in vacuum installations.
软启动阀适用于在粗加工过程中调节燃气气流，能防止管道和容器中的气体动荡、真空装置的微粒污染等。
The numerical simulation was used to analyze the flow characteristics of cryogenic throttle valves. A test bench was also built up to investigate the performance of the different valve needles.
运用数值模拟方法分析了节流阀的流量特性，并运用实验的手段测量了其流量系数与阀门开度之间的关系。
The numerical simulation was used to analyze the flow characteristics of cryogenic throttle valves. A test bench was also built up to investigate the performance of the different valve needles.
运用数值模拟方法分析了节流阀的流量特性，并运用实验的手段测量了其流量系数与阀门开度之间的关系。
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