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after a further settling period of 10 minutes, 30 ml of supernatant fluid is removed by suction and the remaining 15 ml is poured into a petri dish or larval counting basin for examination.
uue, 10minutilise settimisaja möödudes imetakse välja 30 ml settepealset vedelikku ning allesjäänud 15 ml valatakse uurimiseks petri tassi või vastsete loendamisanumasse.