| 摘要 |
<p>The self-orientatable twin castor (1) has a support (2) made of plastics for a pair of coaxial wheels (3,4). The support (2) is constituted by a tubular hub (5) with which a substantially semicircular wall (10), arranged in the median plane of the castor (1), is rigidly associated in a perpendicular manner. A semi-cylindrical casing (26) made of metal is associated with the edge of the wall (10) and has wings (30) for positioning and retaining it on the edge of the semi-circular wall (10). <IMAGE></p> |
