| 摘要 |
<p>The unit has base (2) and a retaining bar in the form of flat material strips. The bar has openings that include projections, which are designed as threaded bolts (8). A ring flange (9) and a projection are found at front side end of the bolts in recesses for definitely positioning the bolts, and are engaged to the base. The bolts are friction-locked to the base. Recesses are arranged at a longitudinal side of the base facing the bar.</p> |
