| 摘要 |
Method for shaping thin sheet metal elements by the action of a lever 1 articulated, on one side, at a fixed point and laid, at its other end, on a jack 3. An extending part 4 fixed to the lever makes it possible to bend the sheet metal by lifting up the jack. Installation of the elements thus formed by using pivoting masts 20 actuated by a fixed winch on the building to be covered. <IMAGE>
|
