第四代铁路内燃机油
the fourth generation railroad locomotive internal combustion engine oil
NS1602型铁路起重机
type-NS1602 railway crane
内燃动力起重机
internal combustion crane
内燃机燃烧
diesel combustion
combustion
combustion of internal combusition engine
内燃液力传动
diesel-hydraulic transmission
内燃液力传动机车
diesel hydraulic locomotive