| 摘要 |
<p>The saddle (1) has its supporting frame made with two lower straight sections (3) of round cross-section, clamped together between the jaws (4,5) of a support. The jaws are compressed and released by a single bolt (8) which allows the saddle to be adjusted lengthwise by turning the bolt's hexagonal head (9). The facing surfaces of the jaws can have horizontal grooves in them for additional grip.</p> |
