automatic closing fire damper

同义词释义

1)automatic closing fire damper,自动关闭防火挡板2)automatic closing fire damper,自动关闭挡火闸3)automatic fire damper,自动防火挡板4)fire proofing door automatic close,防火门自动关闭5)automatic closing fire door,自动关闭防火门6)fire-resisting rolling shutter,防火滚动挡板