如果要升高减少的水压，则慢慢顺时针方向旋转调节螺丝直到系统压力表指示达到所需压力为止。
To raise the reduced pressure - slowly turn the adjusting screw clockwise until the system gauge indicates the pressure required.
差压表是用来检测两个检测点的压力差值，直接在仪表表盘上指示出差压值的机械式压力表。
Differential pressure gauges is used to test the pressure difference between two points, it is a mechanical pressure gauge that can directly indicate the pressure difference on the instrument meter.
需排空气待压力表指示正常后继续下一步操作。
Air pressure gauge to be waiting to be instructed to continue normal operation the next step.
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