摘要 |
Rotor comprising a shaft (6) having an axial direction (A-A′), whereby an inner and central cooling channel (8) with an inlet (9) and an outlet (10) for a cooling agent is provided in this shaft (6), extending in the above-mentioned axial direction (A-A′), characterised in that the above-mentioned cooling channel (8) is at least partly provided with inwardly directed fins (11).
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