燃烧期是热风炉一个工作周期的一部分。在燃烧期中，气体燃料在热风炉的燃烧器中燃烧产生的高温烟气从热风炉格子砖的孔洞中通过，把热量传给格子砖。 燃烧是蓄热过程，时间越长蓄热越多，但它受顶温和烟道温度的限制。合理的燃烧和送风周期应该根据热风炉座数、送风方式和高炉所需风温水平选定。
最新一期的《侦探》(以讽刺揭发各种丑闻为主的杂志)封面，展示了伦敦街头汽车燃烧的场景，而穿着风衣帽的年轻抢劫者们还在一旁观看着。
The cover of the current issue of Private Eye, a fortnightly satirical magazine, shows cars ablaze in a London street as marauding, hoodie-wearing youngsters look on.
根据能量平衡原理，建立了基于预热燃烧风富氧下铜精炼阳极炉高温烟气热损失数学模型，并根据富氧燃烧风对铜精炼阳极炉氧化期高温烟气热损失数学模型进行计算。
A mathematical model of heat loss of high temperature smoke vented from rotary anode furnace in copper refining based on warm-up burning air was established based on principle of energy balance.
介绍了硼的物理化学特性和燃烧机理，硼的点火延迟期长、燃烧效率低是由其本身的特性所决定的。
Physicochemical properties and combustion mechanism of boron are introduced. Long ignition delay time and low combustion efficiency are due to the properties of boron itself.
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