show the amount of fabric wear y1, y2, and y3 in three successive periods: (1) the first 1000 revolutions, (2) the second 1000 revolutions, and (3) the third 1000 revolutions of the abrasive wheel
show the amount of fabric wear y1,y2, and y3 in three successive periods: (1) the first 1000 revolutions, (2) the second1000 revolutions, and (3) the third 1000 revolutions of the abrasive wheel