Device used to move automatic guns in a vertical plane. A reversing or reciprocating drive system provides motion.

喷枪在垂直面自动移动的装置，一个回动的或往复式的提供移动的装置。

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No external part is required by the device for reversing the cylinder, and the high-speed back-and-forth motion can be achieved, so that an object can move fast.

本装置不用任何 外部件对气缸进行换向，就能达到高速往返运动，能使物体快速移动。

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The key is absorbing the downward motion and reversing the force into an upward motion as rapidly and smoothly as possible.

要点就是吸收向下的动力，并尽可能迅速平稳地将这个力量转换成向上的动力。

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By sacrificing four premium draft picks, Mr. Shanahan is reversing the plan he set in motion last year to stockpile picks to rebuild Washington's depleted roster.

WSJ: Washington Redskins Trade Gives Team a Shot at Griffin