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Old Comments:

2008-02-20 02:06:58
ist they aimed a little bit high?.. ist the sound reflected back like 2-3 m above the ground?
2008-02-20 01:45:01
A system based in UK to hear Nazi's planes coming, during the WW2. These mirror reflected the sound.
2008-02-20 01:26:42
What is it?
2008-02-20 01:26:19
What is it?