| 摘要 |
<p>Spacer for concrete reinforcement bars has at least one end part of pref. polystyrene, and the middle part connecting the ends of pref. polyvinyl chloride. The ends have recesses to receive two crossing reinforcing bars, and at least one has a greater cross-section than the middle, to which it is joined by a force plug fit. The mid-part is extruded with a cross-shaped profile.</p> |
