NBC SURVIVOR

Apparatus for air conditioning, for ventilation and for other aeration technologies, namely with an airtight housing, an inlet and an outlet connector, fan means and at least one filter unit for protecting the persons and property in closed premises and underground shelters; centrifugal and axial ventilator systems for industrial use, comprising regulator fitting for gas conduits, thermostatic bleeder valves for safety purposes, air baffles and air vents, air filters for gases, vapors and materials in suspension, all goods for use in protecting persons and property in closes premises and underground shelters

Building, installation and repair of shelters