In practice very few systems have ever used more than rings 0 and 3 to implement protection schemes.

Another brutal protection scheme was grinding from track 1 to 40 and back a few times.

The Master lock company made their older combination locks with a protection scheme.

In anticipation of this, the Rams installed multiple protection schemes during the week.

This protection scheme can be implemented in most mesh networks.

Coal was, however, quite inert and could be used as part of the ship's protection scheme.

This is the heart of the entire addressing and protection scheme.

Vick's only options were changing the protection scheme and calling which side of the field to run the play.

The assisting spouse is also granted the right to a social protection scheme on demand.

Iron-built ships used wood as part of their protection scheme.