浅析东风4型机车柴油机密封盖(大油封)漏油的原因及防治
천석동풍4형궤차시유궤밀봉개(대유봉)루유적원인급방치
A preliminary analysis of reasons and preventive treatment of leakage of sealing covers(bigger oil seals) for DF4 locomotive diesel engines
저자의 최근 논문