The fresh air is compressed then stored in （).

A charge of fresh air is drawn into the engine cylinder and then _____ by the moving piston_____ very high pressure.

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The primary task of the compressed air system is to deliver the starting air necessary for

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Open the window and let in some fresh air.（英译中)

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Charging is the filling of the engine cylinder with a supply or charge of fresh air _____

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In slow speed two-stroke engines, the fresh air entering begins when and stops as .A.the i

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What is the function of the modern windows？A．Allow fresh air to blow in.B．Keep out the wor

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The decorator suggested that he ( )up a screen on the window to let-in-fresh air and k

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