98321301
Dec 19, 2023
Fire dampers, namely, control devices used in air ducts to stop the spread of fire; Motorized fire dampers, namely, control devices used in air ducts to stop the spread of fire; Motorized smoke dampers, namely, control devices used in air ducts to stop the spread of smoke; Motorized fire and smoke dampers, namely, control devices used in air ducts to stop the spread of fire and smoke; Air filters for HVAC units; air filters for industrial purposes
Environmental Control Apparatus