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To: 21twelve

I knew a guy that was an expert in the design and manufacture and use of gravity meters.

Gravity Meters in use every day!

52 posted on 01/13/2016 1:47:56 AM PST by Swordmaker (This tag line is a Microsoft insult free zone... but if the insults to Mac users continue....)

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To: Swordmaker

LOL! I was telling some guy I met about the use of gravity measurements. He pulled a pen out of his pocket and dropped it. “Like that?”

54 posted on 01/13/2016 2:08:45 AM PST by 21twelve (http://www.freerepublic.com/focus/f-news/2185147/posts It is happening again.)

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