A protection cover is positioned on the base, and all the flame nozzles are covered under the protecting cover.

一保护罩位于底座上使所有喷火嘴被罩覆于保护罩之下方。

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Curtains need to be covered in flame retardant to prevent fire spread, for example, and certain other materials have chemicals added to them in order to make them more flexible, more rigid, or more rugged.

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