| 摘要 |
A frustoconical tee formed from an annular strip (12) of flexible sheet material. The two ends (18, 20) of the strip are superimposed and releasably secured to one another by a coating of contact adhesive applied to one side of the strip or by complementary, cohesive regions of hooks (14) and pile (16) provided on the opposite sides of the strip. The height of the tee may thus be readily adjusted by varying the extent to which the two ends (18, 20) of the strip (12) are overlapped. |
