Classic examples are the vertical edges of walls running in alignment with the sides of television screens and the edges of ceilings being parallel to those of table tops and cabinets.
常见的例子有：墙壁的垂直边和电视屏幕相互平行，同样天花板则与桌子和衣柜的上面平行。
2
Trimming of the edges of sheet strip to make them parallel. This done at either the stainless steel mill or at the stainless steel processor.
对薄板的边缘进行修边以使两边平行。此工艺可在不锈钢工厂或不锈钢加工者处完成。
3
Two edges of P are said to be equivalent if they are parallel.