| 摘要 |
<p>The liner (12) has a reinforcement (18) for reinforcing torsion resistance of the liner around a fulcrum of a stand. The reinforcement is rigidly fixed in a corner of the liner by fixation points (34-39) e.g. welding points. The three fixation points (37-39) form anchoring points that are aligned on an anchoring axis (48) perpendicular to an effort axis (50) passing through the fulcrum and a traction point (28) located in a corner diagonally opposite to the former corner of the liner.</p> |
