Выражение встречается в тексте по технологии пивного производства между кипячением сусла и его разделением

Фраза
The subsequent boiling of the wort was effected for 60 to 90 minutes with hopping and subsequent whirlpool rest period of 20 to 30 minutes. This was followed by coarse sludge separation and the wort was cooled down to a pitching temperature of 6 degree C by means of a plate cooler.

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