| 摘要 |
A greenhouse for growing agricultural plants consists of vertical supports with stay bars, above which hinged nontransparent frames are arranged. In the greenhouse metal bands arranged horizontally at angle of 25.....35 degrees to the horizontal line from the southern side of the greenhouse are used. Certain ends thereof are fixed on the greenhouse body frame, and the others are connected with the hinged frames with the aid of a roller system, rocking arms, levers and ropes. |
