The compartments according to the invention are arranged in the form of a battery and, at the front, give access to a common trough 9. They are separated by concrete partitions 1. Each partition 1 is supported by at least two feet 1, 3 and comprises a front part 6 forming a separation in the trough 9. The partition 1 is provided with fastening means for transverse tubes 14 closing the compartment towards the front and towards the top. At the rear a closure panel is provided, mounted slidably between a groove 20 in a foot 3, on one side, and a groove in the partition 1 forming the other side of the compartment. As a variant, a rear panel 24 is equipped with lateral arms 23 mounted pivotably on shafts 22 fixed on the partitions 1. The panel 24 can be manoeuvred from the front of the compartments by means of an arm 25. IMAGE
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