| 摘要 |
<p>Breaker has a shaft with arms. A fixed grid crosses the arms during rotation of the shaft, which, with its bearings, is on a rolling chassis which can be brought from the grid up to a retracted position in which the grid is disengaged. Pref. the shaft drive motor and transmission are on a rolling chassis. The chassis frame is U-shaped; each branch carries one of the bearings, and they flunk the grid in the shaft's working position.</p> |
