. . "ventilation system"@en-us . . "04526520-n"^^ . . . "a mechanical system in a building that provides fresh air; \"she was continually adjusting the ventilation\""@en-us . . "0"^^ . . . . . . . . "104526520"^^ . "0"^^ . . . . "103571190"@en-us . "ventilation"@en-us . . . . . . . . . . . "ventilating system"@en-us . "ventilation"^^ . "a mechanical system in a building that provides fresh air; \"she was continually adjusting the ventilation\""@en-us . . "104350364"@en-us . .