机油光谱分析技术已广泛用于内燃机车柴油机的磨损状态监测。
Spectrographic oil analysis technology has been used in the condition monitoring of diesel engines.
分析了内燃机车柴油机故障诊断技术的现状，在此基础上提出了开发柴油机诊断专家系统的必要性；
This paper analyzes the diagnostic technologies of the diesel at present, and points out that it is necessary to develop an diagnostic expert system.
大连机车车辆厂研制的东风4D系列内燃机车，是以240/275ZJD系列柴油机为动力的一组机车的统称。
DF4D series Diesel Locomotives designed and manufactured by Dalian Locomotive Works, are a group of locomotives that utilize 240/275ZJD series diesel engines.
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