engine cleanliness level 发动机清洁度
Engine room cleanliness 机舱的清洁情况
engine oil cleanliness 机油清洁度
engine adjustment cleanliness 发动机的沾污性
Excellent detergency and preservation, maintain engine cleanliness, prevent engine corrosion.
优异的清净性和防腐性，保持发动机清洁，防止发动机腐蚀。
Purity Protection System saves fuel, reduces the level of deterioration, maintains cleanliness in the engine, increases productivity and inter-service interval.
纯度保护系统可以节省燃油、降低恶化水平、保持发动机清洁、提高生产力并延长服务间的间隔。
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