In this case, the vertical bars must still be specified.

The vertical bar means that the variables to the right are being held constant.

It was open to the air but closed to escape by means of vertical bars.

This was done by joining both pins with a short vertical bar.

The numbers one, two, and three are all represented by vertical bars.

He tapped the center of the big blue vertical bar.

This is a vertical bar placed on only one end of the bond.

The vertical bars now formed two sets, a little off line.

A black vertical bar on the head runs through the true eye, making it hard to see.

They have five to nine dark vertical bars on their sides.