1.   Workers used steel beams to brace the roof.

2.   The electron microscope uses a beam of electrons to produce images at high magnifications.

3.   More expensive systems use laser beams to follow lines.

4.   A laser beam is used to control the placement of an electric charge on a metallic drum inside the printer.

5.   In the past, the Army used the beam of concentrated light to blow up missiles on the ground and speeding drones and rockets flying at relatively low altitudes.

6.   It uses electron beams, not X-rays.

7.   Litton countered that the patent was primarily concerned with the way to use electron beams to make mirrors.

8.   Meanwhile, researchers are developing better tests, using laser beams and fiber optics, to more quickly detect microorganisms.

9.   Not even for a crank protest candidate who wants the New World Order to stop using laser beams to read his mind.