Karr followed, not knowing what to expect as they passed through the imposing vertical opening.

There was a vertical opening in the metal shield surrounding the machine gun.

Shaft construction describes the building of vertical openings such as Raises and Shafts.

She recovered quickly and stared through the vertical opening into an underground garage area.

Falling down vertical openings is the most common cause of death and injury in abandoned mines.

One of the most obvious deformities is its mouth, which has only a narrow vertical opening.

The windows are organized one above the other in vertical openings in the stone cladding.

The bolt had vertical openings into which a set of pins fit.

There are also at intervals, vertical openings to allow for drainage of any accumulative water inside the castle walls.

A waistcoat has a full vertical opening in the front which fastens with buttons or snaps.