Without the oil, compression games would escape into the crankcase area, which will make effect on the performance of the engine.

如果没有机油，压缩的气体会从曲轴箱溢出，这会对发动机的性能带来影响。

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The ways of intensification are analysed and specific measures are introduced for the small-sized, two-stroke petrol engine of crankcase compression.

针对曲轴箱压缩的小型二冲程汽油机，分析了强化的途径、并介绍了具体的措施。

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