General installed in the valve cylinder and the cylinder valve between the tube close to the road, so that the exhaust cylinder without a valve directly into to the cylinder for the purpose of rapid.

该阀一般安装在气缸与换向阀之间靠近气缸的管路上，使气缸的排气不经换向阀直接排出，达到气缸快速换向的目的。

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The use of hydraulic cylinder in hydraulic elevator, the part usually has five parts: piston and piston rod, cylinder and cylinder head, buffer device, sealing device and exhaust device.

液压升降机中使用的液压油缸，其组成部分通常有五部分：活塞和活塞杆、缸筒和缸盖、缓冲装置、密封装置、排气装置。

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As the piston moves up it is compressed, the spark plug ignites combustion, and exhaust exits through another hole in the cylinder.

当活塞上行压缩气缸中的混合气体，火花塞点燃气体燃烧，通过气缸上另一个孔排气。

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It looks like the Italian Gambalunga bikes from years ago, thanks to classic styling cues like a low frame and handlebars, rounded front fairing, its dial design and dual-cylinder exhaust.

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In this case it's a four-cylinder BMW-sourced engine providing that extra range, exhaust peeking out just behind the front-left wheel.

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The EPA pulled off the feat by sharply increasing the amount of oxygen-poor exhaust that is recirculated into the combustion chamber and increasing the pressure of the fuel being forced into the cylinder.

FORBES: EPA, Inc.