The answer: wells that drill vertically down to the shale bed, then make a gradual 90-degree horizontal turn through the shale deposit.

目前，科学家提出了解决方案——先垂直钻探至页岩床位置，然后以90度水平地钻探页岩沉积层。

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Besides, using the vertical lathe to turn vanes can eliminate the defects that a floor-type horizontal machine is low in rotary speed, unstable in slewing and the like.

而且，用立车加工叶片，消除了落地卧式车床的转速低、回转不稳定等缺点。

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Prairie landscapes from 1927 turn a train and tall grain elevators into minimal vertical and horizontal strokes, while roiling clouds and the engine's rising smoke prefigure familiar abstract elements.

WSJ: Clyfford Still Museum | Irascible Still | By Karen Wilkin

There's a 90-degree turn that sends many racers crashing into the wood walls and they barrel down toward a 16-foot-high banked U-turn that puts racers nearly horizontal.

WSJ: An Icy Face-Off for Those Who Think Hockey Isn't Rough Enough