ArticleEFFECT OF VACCUUM LEVEL, PULSATION RATIO, CLAW SIZE AND USING DUOVAC UNIT ON PERFORMANCE OF MACHINE MILKING OF FRIESIAN COWS
ArticleEFFECT OF VACCUUM LEVEL, PULSATION RATIO, CLAW SIZE AND USING DUOVAC UNIT ON PERFORMANCE OF MACHINE MILKING OF FRIESIAN COWS