preboiler
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NJU型机车预热锅炉自控器和变流机组自控器是为取代V_（1003）和V_（100）型机车同类装置而研制。
NJU automatic controllers used for the preheating boiler and converter unit of diesel locomotive are developed for the replacement of the similar equipment in V_(1003) and V_(100) diesel locomotives.
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