We even have a handful of demonstration vehicles to prove it.

However, at the opening ceremony, the demonstration vehicle got stuck and had to be manhandled in.

To provide realistic testing, the demonstration vehicle is the same size and weight as the projected operational craft.

A sub-scale demonstration vehicle made its first flight on November 13, 2006.

And G.M. created the first demonstration vehicle powered by a fuel cell in the late 1960's.

The production version has two key modifications from the demonstration vehicle to improve efficiency.

She noted yesterday, for instance, that she drives a demonstration vehicle that runs on compressed natural gas.

An immense pork-laden highway spending bill is trundling through Congress like some surreal demonstration vehicle for the nation's skewed values.

It was done on the receivers orders to stop disgruntled workers taking demonstration vehicles from the site.

By the 1990s, automobile manufacturers were interested in fuel cell applications, and demonstration vehicles were readied.