A downwards force is necessary to maintain the position of the tool at or below the material surface.

We maintained our speed with a steady energy output at 5% below the velocity of light.

To keep continuity within your organization and bring about stability, you need to maintain a core group of leaders below management level.

A similar device that maintains a temperature below the freezing point of water is called a freezer.

The rest of the year, they sail and ski in temperatures that the sea maintains not far below freezing.

He left Philadelphia in the spring of 1988 amid reports that he didn't always maintain the best relations with those above and below him.

This means he has to maintain his weight significantly below natural levels, even for a jockey.

The town has its own electric division and maintains rates well below the state's average.

If you could somehow maintain the vacuum below the scale, you would see a significant reading.

I do not know of any workable way to maintain the vacuum below the pan.