ISO 5220-1981/Add 1-1984 空气分配和空气扩散.恒定和可变双或单风管箱和单风管装置的空气动力学试验和额定值.附录1:带诱导流设施的可变一次流量控制装置
Air distribution and air diffusion — Aerodynamic testing and rating of constant and variable dual or single duct boxes and single duct units — Addendum 1: Variable primary flow rate control devices wi