| 摘要 |
The bearing has an upper bearing guide (2,5) and a lower bearing seat (3) with a ball (4) inserted between them, the bearing seat supported from below by a bearing block (6). The ball is secured between the bearing guide and the bearing seat by a force which is less than the rotor weight when the rotor shaft (1) is lifted from the bearing, for preventing axial movement of the bearing seat.
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