短语词组短语acoustic soot -blowing 声波吹灰pulse soot -blowing 脉冲吹灰soot -blowing control 吹灰控制boiler soot -blowing 锅炉吹灰optimizing soot -blowing 优化吹灰pulsating soot -blowing 脉冲吹灰 返回 soot blowing