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2. Floating shelf - Wikipedia

   en.wikipedia.org/wiki/Floating_shelf

   A floating shelf can be supported on hidden rods or bars that have been attached to studs. A thick floating shelf may be made of a hollow-core shelf glued to a cleat. A floating shelf may have two or more channels open from the back towards, but without reaching, the front, into which slide fasteners attached to the wall, typically held in place by screws inserted through the bottom of the shelf.

3. Floating ground - Wikipedia

   en.wikipedia.org/wiki/Floating_ground

   Electrical equipment may be designed with a floating ground for one of several reasons. One is safety. For example, a low-voltage DC power supply, such as a mobile phone charger, is connected to the mains through a transformer of one type or another, and there is no direct electrical connection between the current return path on the low-voltage side and physical ground (earth).

4. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   The 19-inch (482.6 mm) standard rack arrangement is widely used throughout the telecommunication, computing, audio, video, entertainment and other industries, though the Western Electric 23-inch standard, with holes on 1-inch (25.4 mm) centers, is still used in legacy ILEC / CLEC facilities. A 19-inch rack used for switches at the DE-CIX in ...

5. How Floating Shelves Upgrade Any Room’s Decor - AOL

   www.aol.com/floating-shelves-upgrade-room-decor...

   Amazon Buy A blank wall at the end of a hall or entryway is a prime spot to add floating shelves for some added depth, texture and decoration. Place picture frames or other tchotchkes on it, and ...

6. Isolation transformer - Wikipedia

   en.wikipedia.org/wiki/Isolation_transformer

   In electronics testing and servicing, an isolation transformer is a 1:1 (under load) power transformer used for safety. Without it, exposed live metal in a device under test is at a hazardous voltage relative to grounded objects such as a heating radiator or oscilloscope ground lead (a particular hazard with some old vacuum-tube equipment with ...

7. Shelf (storage) - Wikipedia

   en.wikipedia.org/wiki/Shelf_(storage)

   Shelf (storage) A shelf ( pl.: shelves) [1] is a flat, horizontal plane used for items that are displayed or stored in a home, business, store, or elsewhere. It is raised off the floor and often anchored to a wall, supported on its shorter length sides by brackets, or otherwise anchored to cabinetry by brackets, dowels, screws, or nails.