调整：用粗调和细调的方式连续可变。
Adjustment: Continuously variable in either coarse or fine modes.
文中提出分阶段(粗调、细调和精调)实施不同控制规则的控制方案，用于提高锅炉燃烧的热效率。
The paper states a control strategy implementing different control regulation in different phase (coarse, fine and precision tuning) for enhancing the thermal efficiency of combustion of boiler.
本文提出了一种先经过四个步骤的粗调，然后再进行细调的简单快速实验方法。
The paper puts forward a simple and brief experiment method which contains four steps of rough adjustment first followed by fine adjustment.
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