| 摘要 |
A mounting assembly comprises a cranked collar 30 which at its lower end is rotatably supported for movement about a first generally vertical axis 1 and at its upper end rotatably supports a support platform 32 for movement about a second axis 2 cranked at a small angle to the first axis 1. The support member 32 defines a support surface 38 which is displaced by a small angle to a plane radial to the second axis 2. |
