| 摘要 |
The traction block has a U section elongated chassis (1) provided with a flat core (2) and two perpendicular lateral spaced wings (3). Two elongated grip blocks (5) are mounted movably between the wings, so that relative longitudinal movement between the grip blocks and the adjacent wing provides a block transverse movement. A flat cover (8) is parallel to the chassis core and is detachably fixed to the core by an articulation joint (17). The chassis lateral wings have conical studs (15) projecting on their ends facing the cover. The studs fit tightely into corresp. conical cavities (16) in the cover. |
