轻负荷直喷柴油发动机油环粘结及活塞清净性台架的建立及试验方法的研究
경부하직분시유발동궤유배점결급활새청정성태가적건립급시험방법적연구
The Establishment of the Light Duty Direct Injection Diesel Engine Ring Sticking and Piston Cleanliness Test Bench and the Investigation of the Test Method
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