The intake process is the key part to the working circle of the engine.

发动机的进气过程是发动机工作循环的关键所在。

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That's a symresourceuld like circle that won't be stopped working easily or soon.

何等一个循环没有会俭朴轻易被冲破。

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That's a symresourceuld like circle that won't be stopped working easily or soon.

何等一个循环没有会俭朴轻易被冲破。

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