41.   With higher voltage, engineers could use thinner cables, saving weight and energy.

42.   Workstations traditionally have been high-powered computers used by engineers, software designers and financial professionals that cost several times as much as desktop PCs.

43.   Police said engineers used a special chemical to break holes in a large concrete slab covering much of the ruins.

44.   Army engineers had used iron fences and barbed wire to block the western stretch of wall that overlooks the Bogside.

45.   As the recovery started this week, engineers used an unmanned, remote-controlled vessel to measure radiation levels and dig out the buried first compartment.

46.   Before humans try out the rides, the engineers use inanimate objects to test out the forces of gravity.

47.   Back in the days when Communist Party propaganda was the only truth in China, engineer Ma Feihong used to think of Taiwan as close to hell on Earth.

48.   Engineers could use a computer software patch to operate the joint should the main control box fail.

49.   In open areas, the engineers use metal detectors.

50.   More typically, the camera is used by engineers to view walls, pipes, tanks and other equipment too small to be inspected by a person.