| 摘要 |
<p>41-OD-5445 Apparatus for maintaining coaxial alignment of luminaire support ring on a pole as it is raised or lowered on the pole. The aligning apparatus comprises a plurality of roller members secured around the support ring and resiliently urged against the pole surface to maintain the support ring in substantially centered position relative to the pole and to avoid shock to the luminaires by impace of the support ring on the pole.</p> |
