通风帽 meaning in Chinese

abatvent
deflector cap
ventilating cowl

Ventilation for buildings - performance testing of components products for residential ventilation - cowls and roof outlet terminal devices
建筑物通风.住宅通风用部件产品的性能检验.通风帽和屋顶出口终端装置
Ventilation for buildings - performance testing of components products for residential ventilation - part 5 : cowls and roof outlet terminal devices
建筑物通风.住宅通风用部件产品的性能检验.通风帽和屋顶出口终端装置