直流式太阳能热水系统的出口流量控制是保证系统正常运行的关键之一。
One of the key points to ensure the normal operation of "once-through solar water heating system" is the outlet flow quantity control.
介绍一种用于人工心脏轴流式血泵的无位置传感器无刷直流电动机闭环调速控制系统的电路设计。
A kind of closed loop timing control system based on position-sensorless control for axial blood pump of artificial heart brushless DC motor is introduced in this paper.
结合该工程，介绍了海底世界工程特点、对室内空气温湿度的要求、暖通空调和防排烟系统设计以及直流式空调系统中热管换热器的应用。
The paper presents the status of and the operation method take by the accumulator as well as the direct current system one by one to ensure the reliable and steady-going operation of the whole system.
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