They might not have one.
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送交者: tinaliang 于 2008-06-04, 16:28:19:
回答: obviously it didn't help this time. Of course, we don't know 由 steven 于 2008-06-04, 16:04:40:
An ideal case would be real-time monitor. Using Beidou to send back the location and a central computer logs their path.
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