| 摘要 |
The invention relates to a main girder (1) of a crane for a crane trolley moving in a horizontal direction along the girder, the main girder (1) comprising a cellular structure (3) in a longitudinal direction thereof that has at least two separate, yet interconnected, longitudinal cellular elements (4), each cellular element (4) comprising an outer cover structure and at least one outer cover structure (5) having an inside filled with a core (6). |
