Poor fuel quality. Incomplete combustion and lack of sealing between piston and cylinder wall or badly losing valves. Possibly incorrect engine timing / set up.
燃油品质差，不完全燃烧和活塞与气缸壁之间的密封性差。 。
The results also showed that much more steady combustion could be obtained with mechanical spray nozzle than with steam atomizer for some burners with poor performance.
对于稳燃效果较差的燃烧器，采用机械雾化喷嘴可获得比汽力雾化喷嘴更为稳定可靠的稳燃性能。
The results also showed that much more steady combustion could be obtained with mechanical spray nozzle than with steam atomizer for some burners with poor performance.
对于稳燃效果较差的燃烧器，采用机械雾化喷嘴可获得比汽力雾化喷嘴更为稳定可靠的稳燃性能。
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