防ぼう火かシャッター

noun

fire shutter

A shutter designed to prevent the spread of fire, commonly installed in buildings.

• 火か災さい報ほう知ち器きが鳴なると、防ぼう火かシャッターが自じ動どう的てきに閉しまります。

  When the fire alarm sounds, the fire shutters close automatically.