| 摘要 |
The wheel (14) rotates about an horizontal axis and is mounted on a support structure (12). The support structure has an upper web (20) which bears the wheel on one side and is integral with an inverted conical section and tubular sections of decreasing diameter (22,24,26). Angled roller bearings (18) allow electric motors (30) to rotate the support structure about the base (10) |
