To prevent water and dirt from damaging the suspension, gaiters have been used to cover the fork's stanchions.

This prevents dirt from diffusing light in all directions.

At least weekly, vacuum or dust-mop floors to prevent dirt from getting ground in.

At least once a week, sweep or vacuum rugs and carpets to prevent dirt from becoming embedded.

Nintendo recommends users to leave a cartridge in the slot to prevent dust and dirt from entering the system.

A protective encasing prevents dirt from getting into the joint assembly.

The military also wanted a "surface check" grease fitting that would help to prevent dirt from entering through a fitting.

This should be done at least weekly to prevent dirt from becoming ground into the flooring, causing it to lose its shine.

Has hair behind its teeth to prevent dirt and soil from getting inside of the mouth.

The only layers of material on the shoe are in place to prevent dirt and rocks from reaching the foot.