Numerical controlled flow line for pipe shaping.

管道数控加工自动控制流水线。

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The test results have proved that the flow rate widely varied and the pump efficiency is high when the pump outlet line structure was altered and the outlet pressure was controlled in a special limit.

试验结果表明，改变泵出口管线结构，使泵出口压力在一定范围内工作时，流量变化大，而且泵效率较高，可以作为泵调整参数的一种手段；

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A new principle is adopted in designing low pressure MOCVD equipment. The principle is that the pressure is set and controlled separately in outlet and inlet of gas line of mass flow controller.

采用了一种新的设计原理，即以流量计为基准，将气体入口端和出口端压力双重分别统一控制，进行了低压MOCVD设计。

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