| http://www.w3.org/ns/prov#value | - An annular flange 22 may be provided, if desired, extending around the upper opening 19 of the receptacle 10 to provide rigidity toreceptacle 10 and to facilitate handling thereof.In the preferred embodiment the present vacuum release waste receptacle 10 is fabricated from materials such as polyehthylene, polypropylene, polyvinyl chloride or other thermoplastic material suitable for this purpose b
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