To describe some control elements in the process of improving the steam-water quality with an engineering practice from unit installation, subsystem trial run and integral startup.

从安装阶段、分系统试运阶段和整套试运阶段，结合工程实际，对改善水汽品质的综合过程的控制要点进行阐述。

youdao

It is the first trial run of the first set of steam locomotive of China — 'Dragon locomotive'.

这是中国第一台蒸汽机车—“龙号机车”的首次试运行。

youdao

The locomotive was due to undergo steam tests and trial runs later this month before going on display in August.

BBC: Flying Scotsman

Over the next day and a half, the idea of the screening trial combined with a larger study that comes later gathered steam.

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