About negative pressure results of 10,000
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03:57
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08:42
11:22
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03:55
05:47
02:00
04:25
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08:00
34:07
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01:51
06:01
04:14
10:55
01:21
10:19
06:04
02:53
09:21
11:56
09:17
00:56
04:07
32:25
02:51
06:26
00:19
04:35
05:35
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