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dt 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 dt1 1 2 dt2 1 2 3 4 5 dt3 dt4 dtap dth 1 2 3 4 5 6 7 dtnl dtotal dtp 1 2 3 4 5 6 7 8 9 dtransmission
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