| 摘要 |
A mast assembly comprises a vertically erectable mast made up of a plurality of telescopic mast parts. Furthermore, a carriage is provided which can be moved along the mast parts. This is made possible by the fact that the mast parts consist of two mast sections. The topmost of said mast sections can be coupled to the carriage and to one another, respectively, and can be moved up and down with the carriage along the extended bottom mast sections which have been locked with respect to one another.
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