【化】 排气压力检查孔

exhaust gas low pressure exhaust pipe exhaust gas purifier exhaust gas afterburner car exhaust gas purifier exhaust gas filter top gas exhaust port brake drum inspection hole cover circlip for hole increase of gas pressure high pressure gas gas flow pressure measurement exhaust gas counter pressure nozzle for thermometer of exhaust gas exhaust hole inspection hole excess pressure for supplying gas exhaust pressure exhaust hole in gable gas hole ceiling inspection hole inspection hole on roof