| prov:value
| - When the plant is to be stopped for example over night, the application heads 10, 10??? are disconnected from the arms 15, 15??? and placed in the trays 2, 2??? so that the orifices or nozzles on the hollow members, 11, 11???, is below the level of liquid, indicated by the line 19 in FIG. 4, in the trays and the cover 12, 12??? serves as a lid or a part of a lid for the tray 2, 2???.
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