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介绍大连内燃机车研究所为东风７Ｄ型机车１２Ｖ２４０ＺＪ型柴油机研制新型胀接式中冷器的目的及新型胀接式中冷器的设计和试验结果，说明了新型胀接式中冷器的综合性能比圆管胀接式中冷器更好。
Describes the Dalian Diesel Locomotive Research Institute for the Dongfeng 7D locomotive 12V240ZJ diesel engine to develop a new type of expansion joint intercooler and the new expansion joint intercooler design and test results illustrate the new expansion intercooler integrated performance Than the tube expansion type intercooler better.