It is difficult to have good performance for chain boiler combustion control system due to large delay time, varying coal's quality and steam load.

大纯时延、煤种多变和蒸汽负荷频繁变化是链条炉难以进行良好燃烧控制的原因。

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Through statistics and analysis dealt with the steam output and sales, and got the overall change rules of steam load and the steam pipe heat loss.

对蒸汽热网的蒸汽产量和销售量进行了统计和分析，得出了蒸汽负荷的总体变化规律和总的管网蒸汽损失。

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The building of model of pressure-load character of main-pipe system is helpful to derive the calculation formula of main-pipe total steam load demand.

母管系统压力负荷特性模型的建立有助于推导母管蒸汽总负荷需求的计算公式。

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Mechanisation, from the steam engine onwards, lightened the load of manual labour, creating jobs and wealth.

BBC: Technology

The wheezing, steam-powered devices that we used to have to load with coal before starting up would soon be the preserve of historians and cranks.

FORBES: Bigger, Faster, Moore - Looking Into the Post-PC Era