... ,Gas turbines in different capacities.5,Diesel engine needing to operate for a long time.6,Air-conditioner air supply system in the ... ,Gas turbines in different capacities.5,Diesel engine needing to operate for a long time.6,Air-conditioner air supply system in the ... , and the blowback self-cleaning process proceeds in groups according to the time order preset by the PLC; when resistance loss is ...