避免引风管道堵塞

избежать засорения трубопровода для забора воздуха

耳鸣一个耳朵或两耳中的声音，如嗡嗡声或哨声，在没有外界刺激的情况下发生，通常由某种特定情况如耳朵感染、使用某种药物、听觉管道堵塞或头部受伤引起

A sound in one ear or both ears, such as buzzing, ringing, or whistling, occurring without an external stimulus and usually caused by a specific condition, such as an ear infection, the use of certain drugs, a blocked auditory tube or canal, or a head injury.