The middle of the vertical groove enhances the strength of the structure.

中间的竖向凹槽增强了结构的强度。

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This term refers to the vertical groove between the bottom of the nose and the upper lip.

这一术语指的是鼻子底部和上唇间竖直的凹陷部分。

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By modifying governor characteristic curve and the edges of helix and vertical groove in plunger, as well as adjusting the length of idling spring, the fault is eliminated.

通过修改调速特性曲线、改进喷油泵柱塞的结构和调整怠速弹簧长度消除了故障。

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Already thin and minimal, the pier was then slit in its upper reaches to create a vertical groove that allowed the two resulting sides to flex and absorb horizontal deflections from movement of the roadway.

WSJ: A Concrete Ribbon Through the Clouds | Millau Viaduct | Masterpiece by Joseph Giovannini