Drain off the water at such a time that the wheel has become substantially empty of water at the end of the sum of the times shown in Columns A and C, measured from the time the wash wheel was started.
Drain off the water at such a time that the wheel has become substantially empty of water at the end of the sum of the times shown in Columns A, C, and E, measured from the time the wash wheel was started.
0.027 seconds.