Metallic detergent and ashless dispersant additive system provides superior control of ring belt and pistonskirt deposits, even under the most severe operating conditions.
金属洗涤剂和无灰分散剂系统提供的环带和活塞裙存款优越的控制，即使在最严酷的工作条件。
2
Finally, it introduces the micro-shape ofpistonskirt.
并介绍了活塞的裙部微观形状。
3
Finally, the optimum pistonskirt profile of 135 diesel engine is made as an example.