 The ratio of the time that the liner is open (milking phase) and closed (rest phase) is called the pulsation ratio.The four streams of milk from the teatcups are usually combined in the claw and transported to the milkline, or the collection bucket (usually sized to the output of one cow) in a single milk hose.Milk is then transported (manually in buckets) or with a combination of airflow and mechanical pump to a central storage vat or bulk tank.