These zones establish the differences in the periods of occurrence of a cloud of combustible dust in the air during normal operations.
这些区域建立在正常操作中，在空气中的可燃粉尘云发生时间的差异。
The blast was traced to combustible dust that had collected in a "polishing workshop" duct in a recently completed factory complex in Chengdu, the capital of Sichuan province.
爆炸发生在四川省省会成都一座新近建成的工业园区内。 经调查，引发爆炸的起因是“抛光车间”的一个易燃的集尘管。
The incident also could have been caused or exacerbated by coal dust, which is equally combustible.
这起灾难也可能是由于煤渣引起的，煤渣也同样易燃。
The combustible composition implies the volatile and fixed carbon, which is the source of generating heat. The incombustible part contains water and dust, etc.
可燃成分是指煤中的挥发分和固定碳，它们是产生热量的来源，而其中不可燃成分为灰分和水分等。
Metal dust fires have the potential to radiate more heat and some metals burn at extremely high temperatures in comparison to other combustible materials.
金属粉尘的燃烧产生更多的热和辐射，有些金属粉尘的燃烧火焰的温度非常高，远高于其他可燃物质。
Widely used in outdoor blasting and underground blasting projects with combustible gas and mineral dust explosion risk.
广泛适用于露天及可燃气和(或)矿尘爆炸危险的地下爆破工程。
However, the witness statements as well as the physical evidence leave no doubt that combustible iron dust was also involved in the aftermath of the explosion.
尽管如此，现场目击者的证词和物理证据均表明铁粉参与了爆炸。
However, the witness statements as well as the physical evidence leave no doubt that combustible iron dust was also involved in the aftermath of the explosion.
尽管如此，现场目击者的证词和物理证据均表明铁粉参与了爆炸。
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