| http://www.w3.org/ns/prov#value | - When the magnet 22 is energized, it attracts the rod against the restraint of the spring 21, and thereby releases the receptacle 18 to drop its contents, such as a surfactant, into the tub I. As is common practice, the tub I may be installed in a freestanding housing (not shown) mounted on casters, or it may be installed in a kitchen counter in the manner illustrated in FIG. 2 so that its open top
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