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He could have been used as a demonstration model.
Carr said his demonstration model would rise to about 500 feet.
They are demonstration models which were supposed to last three years.
The house, a demonstration model, is open to visitors by appointment.
My left hand has stood as the demonstration model.
At the end of the hour, he hauled out the demonstration model.
"Would you like to try out one of our demonstration models?"
It had no demonstration models available, so I was unable to test either.
We believe the principle is sound, and are now developing the technology to make a demonstration model.
The first machine I tried was a demonstration model, and it broke down.
