| 摘要 |
The invention relates to a construction system with large parts fabricated and lying on site, having a mounting device, hereafter referred to as a central lifter, characterized in that a mechanically operated block and tackle known per se, having at least one roller block is fixed to the upper end of a mast, the bottom of which stands in a hole in the interior of the part to be lifted, or is fixed to an elongated body, such as a lattice girder, and the lower rollers of which are distributed to at least one roller block. |
