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The flip-disc display (or flip-dot display) is an electromechanical dot matrix display technology used for large outdoor signs, normally those that will be exposed to direct sunlight. Flip-disc technology has been used for external destination signs on buses and trains across North America , Europe and Australia , as well as for variable ...
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A Magnetic flagman wigwag signal in use in southern Oregon, June 2007. Wigwag is a nickname for a type of railroad grade crossing signal once common in North America, referring to its pendulum-like motion that signaled a train's approach.
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White metals are commonly used in bearings and bushings because of their high load-bearing capacity and self-lubricating properties, which reduce friction and extend the lifespan of these components. [ 3 ] [ 4 ] In the automotive industry , they are found in engine components like piston rings and connecting rods. [ 5 ]
The CPSC posted a warning Thursday that “Magnetic Chess Games” sold by China-based seller JOMO contain magnets that do not comply with U.S. federal safety regulations. The CPSC said it issued ...
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