Мы используем службу перевода для оказания содействия нашим пользователям. Let say, the mixture of potassium hexacyanoferrate(III) and phenolphthalein is the rust indicator. And we use to detect the rusting of an iron nail. And The end result is: the idea, head location of the nail seem blue color; the straight https://tropicallimos.co.uk/prom-car-hire/