| 摘要 |
<p>The rock screen assembly has a plurality of inclined parallel steel bars (13) each of which is pivotally mounted at its lower end (20) for sideways deflection under load and mounted at its upper end (21) in a manner providing a restoring force which returns the bar (13) substantially to its undeflected position upon removal of the load. The pivotal mounting is achieved by bending each bar (13) back under itself at the lower end (20) and inserting the bent-under portion (18) in a locating hole (17) in a transverse support member (15). The restoring force is provided by angling the upper end (21) of each bar (13) into a respective pair of aligned locating holes (19) in a further transverse support member (14).</p> |
