| 摘要 |
The invention relates to improvements to tunnel greenhouses 10 and more particularly to means for attaching the flexible covering films 12 to the ground. In the invention, these means consist of, on the one hand, protective envelopes 13a, 13b provided along the attachment edges 12b and designed to hold individual weighting chambers and, on the other, sealed chambers 15 which can be filled with a fluid such as water. A major application of the invention is to the attaching of covering films for tunnel greenhouses. <IMAGE>
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