| 摘要 |
<p>The net has rings that engage with each other, where two longitudinal sides of the rings are held by holding ropes. The ropes held by two support bodies are moved in a longitudinal direction and are tensioned at the sides. Running ropes (37-40, 47-50) extending along the support body and fixed to the holding ropes. The running ropes move in a direction of impact location when a rock falls on the net to absorb dynamic energy.</p> |
