| 摘要 |
The clamp has a lower compression beam (1`) provided on a base frame (1), and two supports (2, 3) provided on the base frame, where one support is traversable horizontally on the base frame. Two pairs of horizontal compression beams (6, 7) are provided on the supports so as to be vertically traversable, and an upper compression beam (4) is placed on the supports so as to be vertically traversable. The supports are supported exclusively on the base frame in a vertical direction and are free at opposing ends (2`, 3`). |
