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。

youdao

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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It is difficult to have good performances for chain boiler combustion control system due to much no-load time and variation of coals quality and steam load.

大量延时空载、煤种多变、蒸汽负荷频繁变化是链条锅炉难以进行良好燃烧控制的原因。

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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