消防队员在市中心站一说，他们看到了一个球的火焰和黑烟，上升至基地。

Firefighters at the downtown Station 1 say they saw a ball of flames and black smoke rise from base.

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大可纶纤维具有较好的阻燃性能。在点燃聚酯纤维时，纤维会熔化并在火焰作用下收缩，最终形成球状。冷却后熔球具有较高的硬度。

Dacron polyester fibers have a high resistance to burning. They tend to fuse and shrink away from the flame, forming a bead that is very hard after cooling.

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锦纶燃烧时也无火焰，纤维迅速卷缩，熔融成胶状物，冷却后成坚韧的褐色硬球，不易研碎，有淡淡的芹菜气味。

Also, no flame burning polyamide fiber. soak up quickly, melting into colloidal material, after cooling of the tough hard ball into brown, not easily broken, faint celery research smell.

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