Ключевые слова: abstract, aging, background, bark, brown, circle, concentric, cross, cut, deforestation, energy, environment, firewood, forest, forestry, heap, industry, life, log, logging, lumber, material, natural, nature, old, organic, pattern, pile, pine, plank, raw, ring, round, saw, sawed, section, slice, stack, stacked, stacking, structure, stump, texture, textured, timber, tree, trunk, wood, wooden, woodpile,