| 摘要 |
A sport equipment includes a frame, comprising a hollow tubular structure and a plurality of rigid dividing elements disposed within an internal volume defined by the hollow tubular structure in separated positions along a longitudinal direction of the hollow tubular structure. The dividing elements comprises a side surface facing an internal surface of the hollow tubular structure, extend between transversally opposed portions of the internal surface and are rigidly connected to the opposed portions. The side surface contacts the internal surface of the hollow tubular structure and are connected thereto. |
