How to....

[Taylor]

Hiiiii all, there are 8 cylinders with the same height,700meters, each
of them have 160 cylinder section curves divide by the same distance,
now I want to chose the 8 curves from the same height in the same
time, in other words, I want to regroup them by height, 160 groups,
each of them have 8 curves, what should I do?