| 摘要 |
The mast for community TV and radio antennas, especially to be installed on steep roofs, having a telescopic three-elements structure, consisting in that the bottom tubular element (1) has the clasp (2) in the upper part with tying screws (3) and bearing (4) fixed on the side, in which the screw (6) is rotating, topped with the lever (5), the screw passing through the nut (7) fixed through the extension arm (8) to the middle tubular element (9), in the upper part equipped with the tying screws (10) and the stop screw placed above them (11), whereas the top tubular element (12) has the bolt (13) fixed in its upper part.<IMAGE>
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