Two electromagnets, essentially coiled pieces of copper wire embedded in a steel housing, push the rod up and down.

The die is usually made of tungsten carbide with a steel housing.

They were assembled in Singapore, Indonesia, or Nigeria, and the steel housing came from India.

Geislinger couplings are constructed inside robust enclosed steel housings.

The brick-built setting was replaced with a box-like steel housing, lined with firebrick.

This rod is bonded inside a rubber tube which runs through and is also bonded to an external steel housing.

They usually consist of a spool inside a cast iron or steel housing.

There were six of these, and they were built in a massive steel housing running east-west across the city's base.

Next to it, in a gray steel housing, was a main transformer flanked by a panel covered with complicated switch gear.

The cable, over twenty tons of it, was coiled on an immense reel and sheltered within a steel housing.