ashless additive [助剂] 无灰添加剂
ashless anti-rusting additive 无灰防锈剂
ashless and phosphorous-free additive 无灰无磷添加剂
Metallic detergent and ashless dispersant additive system provides superior control of ring belt and piston skirt 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。
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