| 摘要 |
FIELD: construction, road construction. ^ SUBSTANCE: at least, one rope (3) is fastened to fright (4) being on the ground, through the releasable connection (7). Pulling effort is applied to the rope to lift fright to the given height. The pulling effort is terminated or minimised to start moving the fright downwards, which is followed by the rope. The connection is released during fright moving downwards. ^ EFFECT: effective compaction of ground. ^ 9 cl, 5 dwg |
