Second, the clear wheels are made of a heavier, stronger material.

He felt the pressure and guessed what it was - a black thread of some strong material.

They had found a way to produce massive quantities of the strongest material known to man.

It's as if Thomas were trying to keep her terrifically strong material from running away with the novel.

Steel, then the strongest material known, was too heavy and not strong enough to support that weight.

It is known to be a durable and strong material.

In 1734, the church was built with stronger materials by Fr.

"But all things considered, this is the strongest material per unit weight ever."

All known materials strong enough to serve were too heavy for the job.

All I could wish is that they were of slightly stronger materials.