horizontal surface

基本解释

A horizontal surface raised above the level of the adjacent area, as a stage for public speaking or a landing alongside railroad tracks.
论坛，月台：高于邻近区域高度的水平的表面，如作为公众演讲的舞台和沿铁路线的平台。
odict.net
The formulae for calculating the uphill steering torque resistance, haulage force and power are presented and the results are checked by the measured power on horizontal surface.
提出了在上山坡道上的转向阻力矩、牵引力和功率的计算公式，并以水平地面的实测功率进行了验证。
This paper describes the method of dynamic optimum design for horizontal surface grinding machine structure.
本文阐述了平面磨床结构的动态优化设计方法。

The Microsoft Surface, a horizontal touch-screen computer with neither keyboard nor mouse, will go on sale in November.
ECONOMIST: Computer interfaces
Unfortunately, tragedy can strike with as simple an act as brushing one's elbow across the table, and that's all it took for me to knock my smartphone right onto a hard surface -- facedown in a perfectly horizontal position (the worst imaginable angle).
ENGADGET
The Lipsky home in Parker County, Texas sits atop an area in the vicinity of horizontal fracking lines from two gas wells about a mile below the surface.
FORBES: Promised Land's Fracking Fictions: OPEC Goes Hollywood With Crocudrama