Message posted by Joerg (Webmaster) on May 20, 2005 at 8:16:15 PST:
They look somewhat similar in design to the old road sensors that were used around Area 51 in the early 90's. See attached link.
Attached link: Road SensorsIn Reply to: EG&G Ground Sensors on eBay! posted by ohiotraveler on May 20, 2005 at 3:53:26 PST:
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