21.   It has provided inexpensive, accurate measurement of stresses on aircraft components and gun barrels.

22.   It then shoots the genes inside like a bullet through a gun barrel.

23.   It seemed there were gun barrels sticking out of every nook and cranny, bristling like hairs.

24.   Leave it to that towering intellect and constitutional scholar Charlton Heston to help me see the light at the end of the gun barrel.

25.   Leaf LeBus stood in his shop and saw a burnished silver gun barrel.

26.   Many are cracked or otherwise in need of repair, he said, describing how children climb on the gun barrels to pose for photos.

27.   Many gypsy cab drivers have felt the cold steel of a gun barrel pressed against a neck or belly.

28.   Only the end of the gun barrel glinting in the late afternoon sun gave the game away.

29.   The balls and powder are loaded from the end of the gun barrel using a mounted ramrod.

30.   The blast creates swirls of white smoke, just like puffs from a gun barrel.