This is another area where the tool can be the source of the spark or heat causing ignition of flammable materials.
这是工具可能成为火花源或热源并点燃可燃物的又一类区域。
A fire requires fuel to burn, air to supply oxygen, and a heat source to bring the fuel up to ignition temperature.
一把火需要燃料来燃烧、空气来提供氧气还有使燃料到底燃烧温度的热量。
The ignition temperature and ignition delay time decreased with the increasing radiant heat flux.
结果表明，随着辐射热能流率的增加，着火时间缩短，着火温度降低；
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