air grating

air grating

[′er ‚grād·iŋ]
(building construction)
A fixed metal grille on the exterior of a building through which air is brought into or discharged from the building for purposes of ventilation.

air grating

1. A fixed metal grille on the exterior of a building through which air is brought into, or discharged from, the building for purposes of ventilation.
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Moreover, the children could stand on the warm air grating and warm themselves.