摘要 |
<p>Two fixed clamps (1, 2) are firmly connected with each other via rail rod or pipe (3), a screw shaft (5) arranged between the pivots on the fixed clamps, and a guiding clamp (6) arranged between the two clamps. The guiding clamp is moved linearly by rotating the screw shaft. The free edges (1.1,6.1) of the guiding clamp and either fixed clamp approach or space from each other.</p> |