They might also form part of a school's laboratory equipment for demonstration purposes.
Ample space has been provided for trade exhibits and demonstration purposes.
Two of the latest models were also "on the streets" for demonstration purposes.
The list only shows some popular examples for demonstration purposes.
He set up two engines for demonstration purposes in the grounds of the Lodge.
The power produced is less than 1 W, and they are intended for demonstration purposes only.
The mill now only pumps water in a circuit for demonstration purposes.
I just put this one together for demonstration purposes, sir.
But the aviation industry says it is only using this source of biofuel for demonstration purposes.
The new train seats 44, although since its first test run in March it has carried passengers only for demonstration purposes.
