| 摘要 |
The device consists of the combination of the positionings of the lateral 14, 15 and the upper 9 axial tensioning elements, the latter being known as ridge elements, which by continuous mechanical effect distribute over the surfaces auto-equalising tractions. It is intended to equip more particularly vaulted greenhouses in order to ensure not only the distribution of the tension over all the covering surfaces but also the continuous take-up of any relaxation. <IMAGE>
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