level meter短语¹⁴⁴⁹⁷²⁺² 基本例句 n.电平表水平仪;水位指示器 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。 chemyq