The optic consists of a Fresnel lens from 1904 revolving on steel bearings.

The 1904 lens was repaired in 2004 with steel bearings to replace the mercury.

Ceramics are also more chemically resistant and can be used in wet environments where steel bearings would rust.

The road still needed extra support because steel bearings had been damaged, but it would not need to be rebuilt.

The scientist gazed at him strangely, his eyes glittering like a pair of frozen steel bearings.

It holds the steel bearings for the barrel lugs and the guide rods.

The bearings can be replaced with more durable steel caged bearings.

The drawer opens silently on smooth steel bearings.

The wheels lasted only a couple of shows before blowing out and scattering their tiny steel bearings over the floor.

But because of damage to steel bearings, 20 steel support columns were erected under the northbound lanes.