| http://www.w3.org/ns/prov#value | - If the lever 90 is released when the handle is in one of itsextreme positions, the end of the lever engages with the recess 98,100 by virtue of the force of the spring 94.If it is desired to dismantle the valve assembly, e.g. to clean the valve assembly or replace any of its components, the wing nut 54 is unscrewed along the bolt 50, and eventually the bolt 50 can be pivoted on its pivot 52 to fre
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