| 摘要 |
<p>Floor element, in the form of a slab, made of prestressed concrete or reinforced concrete, characterised in that it consists of a slab (10) which has a plane or smooth underside and whose surface comprises undulations (12) perpendicular to the span, a complementary concrete layer (14) then being cast onto the said slab, at the building site, in order to obtain the necessary thickness of this floor element. <IMAGE></p> |
