Internal measurement study

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27:31
06:56
07:59
20:40
20:42
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14:59
08:15
27:06
07:58
07:49
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36:20
35:08
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17:36
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13:19
10:09
34:51
27:00
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25:40
53:48
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14:40
13:36
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19:28
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