Word: mockup
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Dates: during 1960-1969
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...reactor was invisible to direct observation, but long periscopes, manipulated through a 3-in. opening in the blanket around the core, gave a clear view of the melted spots. All these lights, probes and gauges had to be specially designed, and they were tested on an accurate mockup of the reactor before the atom-age repair crew dared to tackle the real...
...What purports to be a piece of dry sandpaper" used by Colgate-Palmolive to show that even sandpaper can be shaved with its Rapid Shave is actually a "mockup made of glass or Plexiglas to which sand has been applied...