A special metal is required for the missing parts.

It depicted humans destroying the environment on another planet by mining for a special metal called unobtainium.

The process was initially developed to refine certain special metals such as cobalt and nickel.

A magnet is a very special metal.

Perhaps as many as ten, because he must get a special metal.

A shock wave, a voltage, is the clicker a special metal?

It is made of special metals, and was forged by the fire of dragons.

It's a special blaster-proof metal called lattrix - designed to stop terrorists.

They were the important ones, made of the special metal.

We wrap or surround the detectors with this special metal.