line drawing

名词 line drawing:

1. a drawing of the outlines of forms or objects
   同义词：delineation, depiction, limning

1. A line drawn on a weather map or chart linking all points of equal or constant temperature.
   恒温线; 等温线气象地图或图表上所画的一条连结同温或恒温各点的线
2. A pair of horizontal parallel lines drawn across a shield.
   盾形纹章上的横条纹画在盾形纹章上的两条水平的平行线