| 摘要 |
<p>A collar (5) for a drinking trough for poultry rearing of the type comprising a bowl (2) provided with two diametrally opposite side supports (3) provided for hanging said bowl in an operative condition of the drinking trough. The collar (5) is pre-arranged for being mounted in a removable way on the bowl (2) of the drinking trough so that it surrounds the latter, and has a peripheral surface (6,7), which, in the condition where the collar is mounted, increases the capacity and extension of the provisioning rim of the drinking trough.</p> |
