Inside equipments we may have a source of ignition for example a running agitator with a mechanical failure.
高压反应釜但是设备内部也许会有火源的存在，例如，搅拌器搅拌时出现机械故障。
Of course the presence of humans themselves also changes the odds of fire, as people are a frequent source of ignition—both accidental and deliberate.
当然，人类自身的存在也改变火灾的可能性，因为人类是一个经常地导火源——有无意的也有故意的。
Personnel should stay in a well-ventilated area and avoid any source of ignition until their clothing is completely free of any excess oxygen.
人员应一直呆在通风良好的区域，避开任何火源，直到他们的衣物彻底没有任何多余的氧为止。
This can cause a fire if an ignition source is present. Although oxygen is not flammable it will support and vigorously accelerate the combustion of other materials.
如果存在火源，这会导致起火。尽管氧本身是不可燃的，它能支持和大大加速其它材料的燃烧。
Under the action of a same heat source, when the direction of grain is perpendicular to the direction of the action, the ignition delay time is the longest.
同样外部热源作用下，木材内部木纹方向垂直于作用方向时，着火延迟时间最长；
The LEL of a gas is the minimum concentration of that gas in air at which an ignition source will cause an explosion.
气体的LEL是指用火源使空气中的该气体爆炸的最低气体浓度。
The discrete time mathematical model of a switched TIG welding power source is established. The arc ignition process, its property, current wave form and arc stability are analysed.
本文建立了开关式TIG焊电源的离散时域数学模型，分析了电弧引燃过程、引弧性能、电流波形特点和电弧稳定性。
The discrete time mathematical model of a switched TIG welding power source is established. The arc ignition process, its property, current wave form and arc stability are analysed.
本文建立了开关式TIG焊电源的离散时域数学模型，分析了电弧引燃过程、引弧性能、电流波形特点和电弧稳定性。
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