It is a resource we use engineers to explain something quickly, using a few strokes. It is a drawing that is made quickly, to look like a drawing or map. It is usually done on a notebook or table, in the field, where we can't use a desk or a table. Sketch, scheme. sketch, sketch, draft, drawing, drawing, stroke.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
