路沿石是指用石料或者混凝土浇注成型的条块状物体用在路面边缘的界石，路沿石也称道牙石或路边石、路牙石。
有一些人坐在路沿石上。
但有些地方可能就是街道、标志性的建筑或者是上了油漆的路沿石。
Some of the boundaries are walls that seethe with partisan murals, but they can also be delineated by streets, local landmarks and painted curbs.
本机采用油浸导轨，十字拖结构稳定，垂直与水平两个方向自动控制，适用于大理石大板、路沿石。
This machine is adopted liquid-immersed guideway. The cross structure is stable and is controlled automatically in upright and level direction.
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