σ±                                              π★    (1) Meet the Intern♣₽♣₩ational Sled Federation Certifε∏ication Requirements;

                                               ≠∑§                                                π™   (2) consisting of two skid blades, two bladε£e holders, one base (lying board)  ∑, and two bridges;

                          φ                                           ≠↓↓​                           ∑★   (3) Provide matching skid blades;

                                                 ≠∑↕                                  ÷↔>♥               (4) The base (lying board) can be ♥±§tailored according to th​£$e athlete. The athleteδγ↓'s flat is lying on the base≥✘↕, the                                ε×¶ε                                       <≈γ¶                        Ω✘↕           shoulder does←‌ not exceed the rear extension, and ☆♣the knee bend does not exceed the forward>  ☆ extension.