降低发动机效率
reduced engine efficiency
发动机工作效率
engine operating efficiency
发动机冷却效率
engine cooling efficiency
发动机热效率
Thermal efficiency of engine
engine thermal efficiency
临界发动机失效速率
aggregate of plugging material
燃油效率高的发动机转速范围
fuel efficient speed range
fuel efficient rpm range
g系列动力平地机发动机
series g motor grader engine
柴油发动机机油技术规格表
diesel engine oil spec sheet