| 摘要 |
<p>Apparatus including a substrate, having a substrate surface; an object (12) having a maximum dimension smaller than 1 mm; an axle (26), having an axis, attached to the object body; and an axle support (22) attached to the substrate and having a support surface. The axle has a rounded cross-section, as manufactured and forms a non-zero angle with a perpendicular to the surface. The object is capable of rotating about the axle.</p> |
