词汇	gas content tube
释义	gas content tube 充气管
随便看	ventilation duct ventilation ducting ventilation duct of metro ventilation ducts ventilation duct spacer ventilation during tunnel construction ventilation dust prevention ventilation ECT ventilation effect ventilation effectiveness ventilation efficiency ventilation equipment ventilation equipment room ventilation equipment select ventilation equivalent ventilation exhaust ine ventilation exhaust line ventilation exhaust outlet ventilation experiment ventilation facilites ventilation facilities ventilation factor ventilation fan Ventilation fan appliance exteriors cleaned ventilation fanner