室内气流流动状况，特别是高大空间的气流组织，是采暖、通风及空调工程中的一个重要问题。
The status of indoor airflow, especially the air distribution of great space, is an important issue in Heating, Ventilating, and air Conditioning engineering.
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。
Electric or pneumatic actuator available Regulating the flow rate of water and steam in heating, ventilation, and air-conditioning system.
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