Ключевые слова: abstract, background, beams, black, black and white, building material, close up, construction, craft, diagonal, edge, graphic, line, many, material, monochrome, narrow side, natural slate, natural stone, packaging, profile view, profiles, roof tiles, roofer, roofing, roofing trade, selective focus, side, side view, slanting, slate, slate shingles, slates, stack, stone, structure, texture, textured, truss, upright,