| http://www.w3.org/ns/prov#value | - [0031] In the embodiment shown in FIGS. 2a and 2 b two output devices, 50 and 52, respectively, for example of the type mentioned above, are provided???in association with the rod 12???and are connected beneath the plate 14 and at the upper end of the rod 12, respectively, each device being provided with an independent washing-liquid supply duct. [0032] In the diagrams of FIGS. 3a and 3 b, the was
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