Electric or pneumatic actuator available Regulating the flow rate of water and steam in heating, ventilation, and air-conditioning system.
该阀执行机构可选择电动或汽动，适用于采暖、通风及空调系统调节水及蒸汽的流量。
2
The paper analyzes technological plan of localization of electric control and speed regulatingsystem for M1380 outer grinder and gives the result.
分析M1380外圆磨床电控调速系统国产化改造的技术方案，介绍所取得的效果。
3
In this paper a vector controlled ac speed-regulatingsystem is developed, which adopts the rotor flux field-orientated theory to meet the requirements for an electric traction system.