| http://www.w3.org/ns/prov#value | - Referring to the drawings and particularly to FIG- URES 1 and 2, where there is shown by way of illustra tive example, the essentials of a manually operable tool useful in performing the invention, there is provided an underlying plate member 10 having an integral circular raised boss 12 disposed inwardly of the periphery thereof and surrounding an axially disposed circular recess or opening 14 fo
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