Ключевые слова: aged, ancient, boiled, calcite, carbonate scale, cleaned, container, dirty, environment, equipment, grunge, hard, heating, hygiene, industrial, iron, kitchenware, metal, out of order, plumbing, pollution, pot, pot bottom, problem, repair, rusty, sanitary, scale, solid, stainless steel, steel, tab water, texture, toxic, waste, white, years,