| 摘要 |
<p>The invention concerns a device, in particular a signalling device, comprising a base (1), and a signing element (3). The axial cross section of the base (1) forms four sides, namely a small base (1a), a large base (1b) opposite the small base (1a) and parallel thereto, two lateral sides symmetrical relative to an axis (yy') perpendicular to the bases (1a and 1b) and forming a convex line viewed from outside when the device is lying on the ground, its centre of gravity (G) is located on the side of the small base (1a) relative to a line (zz') perpendicular to the ground at the point of contact (O) of the base (1) therewith.</p> |
