Мы используем службу перевода для оказания содействия нашим пользователям. Enable say, the combination of potassium hexacyanoferrate(III) and phenolphthalein is definitely the rust indicator. And we use to detect the rusting of the iron nail. And the result is: the tip, head area of the nail show up blue coloration; the https://tropicallimos.co.uk/rolls-royce-hire/