Thus, frequent adjustment of the control knob is required to maintain constant delivery pressure.
因此经常要调整控制钮，以维持恒定的输出压力。
Finally, it is applied for the design of varied-frequency control system under constant-pressure.
最后，应用于高精度变频恒压控制系统设计中。
Finally, it is applied for the design of varied-frequency control system under constant-pressure.
最后，应用于高精度变频恒压控制系统设计中。
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