夸耶特TM隔音防火门有单开、双开、推拉等多种形式，提供标准及非标尺寸，不同隔音等级需求的产品。

QuietTM Fire Door is of single, double and sliding types and products of standard and nonstandard sizes are available to meet the requirements of different sound insulation grades.

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紧接着的是需求等级中的最高等级。

What follows is the top level of this hierarchy of needs.

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在我们继续模型的下一个阶段之前，要满足之前阶段等级的所有需求。

All requirements for the previous stage level must be satisfied before we proceed to the next stage of the model.

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