Series 7 should be installed downstream of the water meter and of the water pressure regulator.
系列7应该安装在水表和水压力调节器的下游。
Theinstrument is designed based on electromagnetic theory and principle of equilibrium in mechanics and composed of a timer, a current regulator and meter, control circuits and two-arm pinchers.
该仪器是根据电磁理论和力学平衡原理设计的，由定时器、电流调节器和电流表、控制电路及电磁夹具所组成。
The paper introduces the level instruments and describes the realization of the level automatic control by means of ultrasonic level meter and level regulator in sludge treatment engineering.
介绍了液位检测仪表，并阐述在污泥处理站中采用超声波液位计和液位调节器实现液位自动控制的方法。
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