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2014/09/27 22:49
2014/09/27 22:49
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He lowered a hand-held flow sensor down into the water. At the end of the skinny rod, a tiny propeller began spinning in the current, recording the flow. LeCuyer, a hydrology technician with...
2014/09/27 22:49
2014/09/27 22:49
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2014/09/27 22:49
2014/09/27 22:49
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