| 摘要 |
In front of each unit 1 composed of n juxtaposed columns 2 of superposed individual compartments 3, each having a width L, are slidably mounted between lower and upper guides panels 8 also of width L and n-1 in number, so that a single column 2, which may be chosen as desired by sliding the panels 8, is accessible at a given moment, the other columns 2 being hidden by the panels locked in their protection position. <IMAGE>
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