"Did you make any progress," he asked, "on that new propulsion technology?"

"Why would anyone want to destroy the greatest propulsion technology of the new century?"

I'm sorry, but this is not where an inventive mind would create a great advance in propulsion technology.

Possible propulsion technologies were electrical motors, internal combustion and rocket systems.

Seven added, "They likely assimilated new propulsion technologies while replenishing their strength."

It was originally designed to demonstrate advanced propulsion technologies for such aircraft.

Manufacturers of special gears, components of propulsion technology and test systems.

Their propulsion technology can't hold a candle to ours.

However electric propulsion technology is the most developed.

We need to find the most environmentally friendly propulsion technology for vehicles.