| 摘要 |
PURPOSE: A security fire door is provided to prevent the door from being damaged and opened from the outside. CONSTITUTION: A security fire door comprises a door (100) and a door frame (200). The door includes a protrusion unit (110) on a first side part and a Γ-shaped wing unit (120) on a second side part. The wing unit includes a bending unit (120a) formed by being connected from the upper end to the bottom end lengthways. The door frame comprises a protrusion unit connection groove (210) and a wing unit connection groove (220). |
