Layer analysis method is used to do aided engineering decompose, and clustering analysis method is applied to aid classification for interim production.
运用层次分析法对船舶建造进行了辅助的工程分解，运用聚类分析法对中间产品进行辅助分类。
But it has low melting point and sintering point, when it is used to extinguish a fire, it can rapidly decompose to form a layer of film, which can cover the surface of comburent and make the fire.
但低聚磷酸铵具有较低的熔点和烧结点，用来灭火时能迅速分解形成膜层覆盖于燃烧物表面使火焰熄灭。
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