| http://www.w3.org/ns/prov#value | - Other shapes including rectangular, trapezoidal and round shapes may also satisfactorily align the darkspace shield relative to the target. [0063] It is appreciated that either or both of the alignment surface 608 of the target alignment members 602 and the alignment surface 626 of the darkspace shield may be made of an insulative material such as a ceramic.
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