| 摘要 |
The support has a frame (1) with a curved lower horizontal bar (2) that rests on the ground. it is joined to a parallel upper bar (3) by vertical bars (4). The upper and lower bars have tubular pieces (20,21,22,23) that joined together and to the vertical bars by T-pieces. The ends of the tubular pieces are joined to the lateral vertical bars by L-shaped pieces (26). The tubular pieces are joined together by an axial elastic cord, under tension, whose ends are fixed to the L-shaped pieces. Each vertical bar is made from tubular pieces (11,12,13,14,15) that are joined by sleeves (15) and a similar axial elastic cord (16).
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