| 摘要 |
<p>The bin (10) has a wheel (12) comprising a hub (20) assembled on an axle (16). The wheel is provided with a pipe (22) extending along a radial direction from the wheel. The pipe comprises an aperture (23a) that is opened on the hub. A helical spring (24) comprises a contiguous coil portion (26) and a non-contiguous coil portion (28) arranged in the pipe such that a part of the contiguous coil portion is projected from the pipe via the aperture. The axle includes a circumferential groove (30) formed opposite to the aperture of the pipe. The spring is made of corrosion treated metal.</p> |
