| 摘要 |
In a tower crane with a jib (5) of two-piece design, only two hinged joints (22, 23) with a common pivot axis (21) are arranged between the jib parts (7, 8), the articulation point (36) of the top hinged joint (22) being arranged directly above the respective top chord (10, 10') of the jib parts (7, 8), formed in the shape of an isosceles triangle, in order to create an especially simple and especially reliable hinged connection. <IMAGE>
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