采用防火结构，即使软密封材料烧损，金属密封仍能起到作用。
Adopts the fireproof structure. Even if the soft sealing material is burned, the metal seal still takes effect.
轻钢门式刚架近年来被工业厂房大量采用，钢结构防火问题被大家关注。
Light steel portal frames have been extensively used for industrial mill buildings in recent years, and much attention is being paid to the fireproofing of steel structures.
本研究采用膨胀蛭石作为阻燃剂，在实验室试制出了用作防火门芯层材料的三明治结构阻燃刨花板。
A sandwich structure fire-retardant particleboard, which aimed for the core material of fireproofing doors, was prepared in laboratory using heat-expanded vermiculite as a fire-retardant material.
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