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2. This Is The Best Way To Hang Pictures, According To An Expert

   www.aol.com/best-way-hang-pictures-according...

   If your picture's frame is quite small and lightweight, you may only need a few nails to hang it. Hammer the nail on top of the marked spot on the template. A 1/4 to a 1/2 inch of nail should be ...

3. Line laser - Wikipedia

   en.wikipedia.org/wiki/Line_laser

   Line laser with interchangeable lenses. A line laser is a device that employs a laser and an optical lens to project the laser beam as a line rather than a point (e.g. laser pointer). This may be achieved by passing the beam through a cylindrical lens or a Powell lens. [1]

4. Hart's inversors - Wikipedia

   en.wikipedia.org/wiki/Hart's_inversors

   Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram.The addition of fixed points and a driving arm make it a 6-bar linkage. It can be used to convert rotary motion to a perfect straight line by fixing a point on one short link and driving a point on another link in a circular arc.

5. Laser line level - Wikipedia

   en.wikipedia.org/wiki/Laser_line_level

   A laser line level is a tool combining a spirit level and/or plumb bob with a laser to display an accurately horizontal or vertical illuminated line on a surface the laser line level is laid against. Laser line levels are used wherever accurate verticals and horizontals are required, typically in the construction and cabinetry industries. Some ...

6. Straightedge - Wikipedia

   en.wikipedia.org/wiki/Straightedge

   They are also used in the decorating industry for cutting and hanging wallpaper. [1] True straightness can in some cases be checked by using a laser line level as an optical straightedge: it can illuminate an accurately straight line on a flat surface such as the edge of a plank or shelf.

7. List of laser types - Wikipedia

   en.wikipedia.org/wiki/List_of_laser_types

   Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).

8. College Football Playoff Round 1 Overreaction: home field ...

   www.aol.com/college-football-playoff-round-1...

   On this week's overreaction pod, Dan Wetzel Ross Dellenger and SI's Pat Forde acknowledge what led to home teams handedly winning each matchup. They cover how offensive line and defensive line ...

9. Optical tweezers - Wikipedia

   en.wikipedia.org/wiki/Optical_tweezers

   Ray optics explanation (focused laser). In addition to keeping the bead in the center of the laser, a focused laser also keeps the bead in a fixed axial position: The momentum change of the focused rays causes a force towards the laser focus, both when the bead is in front (left image) or behind (right image) the laser focus.