Many people think that the time on their cell phone, clock, or watch is accurate, but Uniondale-based Frequency Electronics, Inc. makes atomic clocks capable of precision timing that makes a Rolex ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Tracor model 304D Rubidium Frequency ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback