| 摘要 |
FIELD: agriculture, in particular, hothouses for cultivation of vegetables, seedlings, flowers. SUBSTANCE: sealing device has three retaining plates whose one ends are connected with ends of fourth plate. Two retaining plates are positioned at one side with respect to plane of fourth plate and one retaining plate is positioned at other side of above mentioned plane. Two retaining plates are positioned at one side of fourth plate and are bent one towards the other. EFFECT: increased efficiency and reduced heat loss during operation. |
