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The standoff provides a margin of space between the motherboard and the case to keep the multiple solder points below from grounding and short-circuiting. Usually, the standoff has a #6-32 UNC male thread on one end which screws into a threaded hole in the case or motherboard backplate and a #6-32 UNC female thread in the other end which ...
Two sizes of metal standoffs and one plastic standoff. The background depicts a standoff in use, holding a circuit board above a metal case. A standoff is a threaded separator of defined length used to raise one part in an assembly above another. They are usually round or hex (for wrench tightening), often made of stainless steel, aluminum ...
A display case (also called a showcase, display cabinet, shadow box, or vitrine) is a cabinet with one or often more transparent tempered glass (or plastic, normally acrylic for strength) surfaces, used to display objects for viewing. A display case may appear in an exhibition, museum, retail store, restaurant, or house. Often, labels are ...
Knob-and-tube wiring at a museum display. Over time, the price of electrician labor grew faster than the cost of materials. This removed the price advantage of K&T methods, especially since they required time-consuming skillful soldering of in-line splices and junctions, and careful hand-wrapping of connections in layers of insulating tape.
At such standoffs, it breaks into particles which tend to tumble and drift off the axis of penetration, so that the successive particles tend to widen rather than deepen the hole. At very long standoffs, velocity is lost to air drag, further degrading penetration. The key to the effectiveness of the hollow charge is its diameter.
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A briefcase or suitcase bomb with about 50 pounds (22.67 kg) of explosives has a 150-foot (46 m) standoff distance. [3] Larger car bombs or truck bombs have a much larger standoff distance, as the blast radius is bigger. [3] A car bomb with a 500-pound (226.79 kg) bomb has a 320-foot (97.5 m) standoff distance. [3]
[7] It was designed as a replacement for the M26 Pershing, M4 Sherman, M46 and M47 Patton tanks, and was the main battle tank of the U.S. Army and U.S. Marine Corps in the Vietnam War. [ 8 ] [ 9 ] : 5 Nearly 12,000 M48s were built, mainly by Chrysler and American Locomotive Company , from 1952 to 1961.