air-conditioning duct 空调系统管道 ; 冷气槽 ; 空调系统管路

Air conditioning duct system 空调通风系统

air conditioning duct 空气调节系统管道

air conditioning duct systems 空调风系统

Single duct air conditioning system 单风道空调系统 ; 单风管空气调节系统

ventilating and air conditioning duct 通风空调管道

dual duct air conditioning system [建] [制冷] 双管空气调节系统 ; 双风道空调系统

dual duct air-conditioning system 双通道空调系统

double duct air-conditioning system 双风道空调系统

dual-duct air conditioning system 双风管空调系统