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I thought you might be interested in looking at сульфат калия.
https://test.bpal.org/topic/94641-%D1%81%D1%83%D0%BB%D1%8C%D1%84%D0%B0%D1%82-%D0%BA%D0%B0%D0%BB%D0%B8%D1%8F/
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