However, a more closed system, open and complex systems, because no fuel tank, oil cooling and filtering the disadvantaged.
但闭式系统较开式系统复杂，因无油箱，油液的散热和过滤条件较差。
However, a more closed system, open and complex systems, because no fuel tank, oil cooling and filtering the disadvantaged.
但闭式系统较开式系统复杂，因无油箱，油液的散热和过滤条件较差。
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