窜漏未完全燃烧的燃油和燃气通过内燃机活塞环泄漏引起燃油稀释和曲柄箱机油污染
The leakage of incompletely burned fuel and gas through the piston rings of internal combustion engines causes fuel dilution and crankcase oil contamination
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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