| 摘要 |
Post for traffic signs, electrical or telephone lines, light fitting and the like, adapted to have minimum resistance when struck by vehicles but sufficient stability under normal conditions, comprising a tube (2) having a plurality of longitudinally arranged, circumferentially and longitudinally spaced elongate slit-like or groove-like weakened portions (1) and a covering layer (4) enclosing the tube and circumferentially stabilizing the tube portions (3) situated between said weakened portions (1). |
