Ключевые слова: background, bit, board, bore, closeup, concept, construction, cutting, drill, drilling, engineering, fabrication, hole, industrial, industry, junk, lathe, machine, macro, manufacture, material, metal, mill, milling, pattern, precision, press, production, scrap, sharp, shavings, shop, spiral, stainless, steel, technical, texture, turnings, waste, work,