| 摘要 |
1. Moulding apparatus comprising a concrete mould (1), means for vibrating the concrete and supports for the mould on which it rests freely, characterized in that it comprises a reaction body (4), in that the means for vibrating the concrete are vibrating hydraulic jacks (13, 14) the amplitude and frequency of their vibrations being ajustable independently of one another, and in that the said jacks are interposed between the reaction body (4) and the mould (1) against which they bear. |
