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I think these are at every airport now in the states.
Marty S3
Marty S3 May 06, 2013
I think these are at every airport now in the states.

I've seen these sensors...

Often 7
Occasionally 5
Rarely 2
Never 0
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Similar Photos: this is used by us in work frequently. very useful. measures distance accurately. Inductive Linear Sensors city sensor MIT

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