| 摘要 |
Invention herewith described refers to the fire protection windows with the expanding protective surface, belongs to the field of fire protection, and specifically refers to the field for the fire spread prevention. This process of fire protection is accomplished with a special device that interrupts the fire zone, penetration of fire products into an unprotected area and the entry of air into the zone protected with this device. The main function of this device is based on the protective surfaces that consist of bearing surfaces and expanding coatings for protecting the building from the fire spreading. These doors have installed the self-closing system which is essential for this function.
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