DUO TEC 28 HE - 47-075-25. DUO TEC 28 HE A (AFTER SERIAL NO.CAC0929 ISSUE 9) - 47-075-36. DUO TEC 28 HE A (BEFORE SERIAL NO.CAC0929 ISSUE 9) - 47-075-36 BEFORE. 28 HE SYSTEM (AFTER SERIAL NO CAB 1112) - 41-075-48.
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