MAKE A MEME View Large Image Nplcaesium.gif atomic clock developed at the UK National Physical Laboratory in 1955 by Louis Essen right and J V L Parry left http //tycho usno navy mil/gif/nplcaesium gif US Naval Observatory PD-USGov-Military-Navy Caesium clocks Jack ...
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Keywords: Nplcaesium.gif atomic clock developed at the UK National Physical Laboratory in 1955 by Louis Essen right and J V L Parry left http //tycho usno navy mil/gif/nplcaesium gif US Naval Observatory PD-USGov-Military-Navy Caesium clocks Jack Parry Louis Essen National Physical Laboratory United Kingdom 1955 developments
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