分析工程机械用柴油机排气异常的原因，对提高设备利用率及使用寿命和减少维修费用有实际意义。
The paper discusses the cause of the unusual exhaust of diesel. It is of practical significance to the improvement of equipment availability and service life and the reduction of maintenance cost.
卡特彼勒是世界上最大的土方工程机械和建筑机械的生产商，也是全世界柴油机、天然气发动机和工业用燃气涡轮机的主要供应商。
Caterpillar is the world's largest manufacturer of earthmoving and construction equipment and a major global producer of diesel and natural gas engines and turbines.
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