fire door

US /ˈfaɪər dɔːr/
UK /ˈfaɪər dɔːr/
"fire door" picture
1.

防火扉

a door that is designed to resist the spread of fire and smoke for a specified period of time

:
Always keep the fire door closed to prevent the spread of smoke.
煙の拡散を防ぐため、常に防火扉を閉めてください。
The building's safety regulations require all exits to have a certified fire door.
建物の安全規制により、すべての出口に認定された防火扉が必要です。