| 摘要 |
This device comprises, in combination: a) jacks 1 provided with a vertical tubular opening 3 which is threaded and cooperates with a threaded rod 4 continued at its upper end via an element 5 of horseshoe shape; b) at least one element 20 for supporting a smoothing board 15 consisting of a curved bar 12 bearing at its lower end a plate 13 on which the smoothing screed board 15 can be fixed by screw-bolt connection; c) if necessary, a complementary component 7 intended to serve as a support for expansion joints, this complementary component 7 being held at the desired height by means of a nut 6 which supports it via its lower face. <IMAGE>
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